diff --git a/db/migrations/2019_11_25_000000_create_messages_table.php b/db/migrations/2019_11_25_000000_create_messages_table.php
new file mode 100644
index 00000000..b34a6c19
--- /dev/null
+++ b/db/migrations/2019_11_25_000000_create_messages_table.php
@@ -0,0 +1,160 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Engelsystem\Migrations;
+
+use Carbon\Carbon;
+use Engelsystem\Database\Migration\Migration;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Schema\Blueprint;
+use stdClass;
+
+/**
+ * This migration creates the "messages" table and copies the existing "Messages" table records to the new one.
+ */
+class CreateMessagesTable extends Migration
+{
+    use ChangesReferences;
+    use Reference;
+
+    /**
+     * Creates the "messages" table, copies the data and drops the "Message" table.
+     */
+    public function up(): void
+    {
+        $hasPreviousMessagesTable = $this->schema->hasTable('Messages');
+
+        if ($hasPreviousMessagesTable) {
+            // Rename because some SQL DBMS handle identifiers case insensitive
+            $this->schema->rename('Messages', 'PreviousMessages');
+        }
+
+        $this->createNewMessagesTable();
+
+        if ($hasPreviousMessagesTable) {
+            $this->copyPreviousToNewMessagesTable();
+            $this->changeReferences(
+                'PreviousMessages',
+                'ID',
+                'messages',
+                'id',
+                'unsignedInteger'
+            );
+            $this->schema->drop('PreviousMessages');
+        }
+    }
+
+    /**
+     * Recreates the previous "Messages" table, copies back the data and drops the new "messages" table.
+     */
+    public function down(): void
+    {
+        // Rename as some SQL DBMS handle identifiers case insensitive
+        $this->schema->rename('messages', 'new_messages');
+
+        $this->createPreviousMessagesTable();
+        $this->copyNewToPreviousMessagesTable();
+        $this->changeReferences(
+            'new_messages',
+            'id',
+            'Messages',
+            'ID',
+            'unsignedInteger'
+        );
+
+        $this->schema->drop('new_messages');
+    }
+
+    /**
+     * @return void
+     */
+    private function createNewMessagesTable(): void
+    {
+        $this->schema->create(
+            'messages',
+            function (Blueprint $table) {
+                $table->increments('id');
+                $this->references($table, 'users', 'user_id');
+                $this->references($table, 'users', 'receiver_id');
+                $table->boolean('read')->default(0);
+                $table->text('text');
+                $table->timestamps();
+            }
+        );
+    }
+
+    /**
+     * @return void
+     */
+    private function copyPreviousToNewMessagesTable(): void
+    {
+        $connection = $this->schema->getConnection();
+        /** @var stdClass[] $previousMessageRecords */
+        $previousMessageRecords = $connection
+            ->table('PreviousMessages')
+            ->get();
+
+        foreach ($previousMessageRecords as $previousMessage) {
+            $date = Carbon::createFromTimestamp($previousMessage->Datum);
+            $connection->table('messages')->insert(
+                [
+                    'id'          => $previousMessage->id,
+                    'user_id'     => $previousMessage->SUID,
+                    'receiver_id' => $previousMessage->RUID,
+                    'read'        => $previousMessage->isRead === 'N' ? 0 : 1,
+                    'text'        => $previousMessage->Text,
+                    'created_at'  => $date,
+                    'updated_at'  => $date,
+                ]
+            );
+        }
+    }
+
+    /**
+     * @return void
+     */
+    private function createPreviousMessagesTable(): void
+    {
+        $this->schema->create(
+            'Messages',
+            function (Blueprint $table) {
+                $table->increments('id');
+                $table->integer('Datum');
+                $this->references($table, 'users', 'SUID');
+                $this->references($table, 'users', 'RUID');
+                $table->char('isRead')
+                    ->default('N');
+                $table->text('Text');
+            }
+        );
+    }
+
+    /**
+     * @return void
+     */
+    private function copyNewToPreviousMessagesTable(): void
+    {
+        $connection = $this->schema->getConnection();
+        /** @var Collection|stdClass[] $messageRecords */
+        $messageRecords = $connection
+            ->table('new_messages')
+            ->get();
+
+        foreach ($messageRecords as $messageRecord) {
+            $date = Carbon::createFromFormat('Y-m-d H:i:s', $messageRecord->created_at)
+                ->getTimestamp();
+
+            $connection->table('Messages')->insert(
+                [
+                    'id'     => $messageRecord->id,
+                    'Datum'  => $date,
+                    'SUID'   => $messageRecord->user_id,
+                    'RUID'   => $messageRecord->receiver_id,
+                    'isRead' => $messageRecord->read === 0 ? 'N' : 'Y',
+                    'Text'   => $messageRecord->text,
+                ]
+            );
+        }
+    }
+}
diff --git a/src/Models/Message.php b/src/Models/Message.php
new file mode 100644
index 00000000..cb658fc6
--- /dev/null
+++ b/src/Models/Message.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Engelsystem\Models;
+
+use Engelsystem\Models\User\User;
+use Engelsystem\Models\User\UsesUserModel;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Carbon;
+
+/**
+ * This class represents a message send trough the system.
+ *
+ * @property integer     $id
+ * @property integer     $receiver_id
+ * @property boolean     $read
+ * @property string      $text
+ * @property Carbon|null $created_at
+ * @property Carbon|null $updated_at
+ * @property-read User   $receiver
+ * @method static Builder|Message newModelQuery()
+ * @method static Builder|Message newQuery()
+ * @method static Builder|Message query()
+ * @method static Builder|Message whereCreatedAt($value)
+ * @method static Builder|Message whereId($value)
+ * @method static Builder|Message whereRead($value)
+ * @method static Builder|Message whereReceiverId($value)
+ * @method static Builder|Message whereSenderId($value)
+ * @method static Builder|Message whereText($value)
+ * @method static Builder|Message whereUpdatedAt($value)
+ */
+class Message extends BaseModel
+{
+    use UsesUserModel;
+
+    /** @var bool enable timestamps */
+    public $timestamps = true;
+
+    /** @var string[] */
+    protected $casts = [
+        'user_id'     => 'integer',
+        'receiver_id' => 'integer',
+        'read'        => 'boolean',
+    ];
+
+    /** @var string[] */
+    protected $fillable = [
+        'user_id',
+        'receiver_id',
+        'read',
+        'text',
+    ];
+
+    /** @var array */
+    protected $attributes = [
+        'read' => false,
+    ];
+
+    /**
+     * @return BelongsTo
+     */
+    public function receiver(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'receiver_id');
+    }
+}
diff --git a/src/Models/User/User.php b/src/Models/User/User.php
index e2ee9b21..c4bc1fcb 100644
--- a/src/Models/User/User.php
+++ b/src/Models/User/User.php
@@ -4,6 +4,7 @@ namespace Engelsystem\Models\User;
 
 use Carbon\Carbon;
 use Engelsystem\Models\BaseModel;
+use Engelsystem\Models\Message;
 use Engelsystem\Models\News;
 use Engelsystem\Models\NewsComment;
 use Engelsystem\Models\Question;
@@ -42,6 +43,9 @@ use Illuminate\Database\Query\Builder as QueryBuilder;
  *
  * @property-read Collection|Question[] $questionsAsked
  * @property-read Collection|Question[] $questionsAnswered
+ * @property-read Collection|Message[]  $messagesReceived
+ * @property-read Collection|Message[]  $messagesSent
+ * @property-read Collection|Message[]  $messages
  */
 class User extends BaseModel
 {
@@ -141,4 +145,38 @@ class User extends BaseModel
         return $this->hasMany(Question::class, 'answerer_id')
             ->where('answerer_id', $this->id);
     }
+
+    /**
+     * @return HasMany
+     */
+    public function messagesSent(): HasMany
+    {
+        return $this->hasMany(Message::class, 'user_id')
+            ->orderBy('created_at', 'DESC')
+            ->orderBy('id', 'DESC');
+    }
+
+    /**
+     * @return HasMany
+     */
+    public function messagesReceived(): HasMany
+    {
+        return $this->hasMany(Message::class, 'receiver_id')
+            ->orderBy('read')
+            ->orderBy('created_at', 'DESC')
+            ->orderBy('id', 'DESC');
+    }
+
+    /**
+     * Returns a HasMany relation for all messages sent or received by the user.
+     *
+     * @return HasMany
+     */
+    public function messages(): HasMany
+    {
+        return $this->messagesSent()
+            ->union($this->messagesReceived())
+            ->orderBy('read')
+            ->orderBy('id', 'DESC');
+    }
 }
diff --git a/tests/Unit/Models/MessageTest.php b/tests/Unit/Models/MessageTest.php
new file mode 100644
index 00000000..11af9a83
--- /dev/null
+++ b/tests/Unit/Models/MessageTest.php
@@ -0,0 +1,171 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Engelsystem\Test\Unit\Models;
+
+use Engelsystem\Models\Message;
+use Engelsystem\Models\User\User;
+use Engelsystem\Test\Unit\HasDatabase;
+use Engelsystem\Test\Unit\TestCase;
+
+/**
+ * This class provides tests covering the Message model and its relations.
+ */
+class MessageTest extends TestCase
+{
+    use HasDatabase;
+
+    /** @var User */
+    private $user1;
+
+    /** @var User */
+    private $user2;
+
+    /** @var Message */
+    private $message1;
+
+    /** @var Message */
+    private $message2;
+
+    /** @var Message */
+    private $message3;
+
+    /**
+     * @return void
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initDatabase();
+
+        $this->user1 = User::create([
+            'name'     => 'user1',
+            'password' => '',
+            'email'    => 'user1@example.com',
+            'api_key'  => '',
+        ]);
+
+        $this->user2 = User::create([
+            'name'     => 'user2',
+            'password' => '',
+            'email'    => 'user2@example.com',
+            'api_key'  => '',
+        ]);
+
+        $this->message1 = Message::create([
+            'user_id'     => $this->user1->id,
+            'receiver_id' => $this->user2->id,
+            'text'        => 'message1',
+        ]);
+
+        $this->message2 = Message::create([
+            'user_id'     => $this->user1->id,
+            'receiver_id' => $this->user2->id,
+            'read'        => true,
+            'text'        => 'message2',
+        ]);
+
+        $this->message3 = Message::create([
+            'user_id'     => $this->user2->id,
+            'receiver_id' => $this->user1->id,
+            'text'        => 'message3',
+        ]);
+    }
+
+    /**
+     * Tests that loading Messages works.
+     *
+     * @return void
+     */
+    public function testLoad(): void
+    {
+        $message1 = Message::find($this->message1->id);
+        $this->assertSame($this->message1->user_id, $message1->user_id);
+        $this->assertSame($this->message1->receiver_id, $message1->receiver_id);
+        $this->assertSame($this->message1->read, $message1->read);
+        $this->assertSame($this->message1->text, $message1->text);
+
+        $message2 = Message::find($this->message2->id);
+        $this->assertSame($this->message2->user_id, $message2->user_id);
+        $this->assertSame($this->message2->receiver_id, $message2->receiver_id);
+        $this->assertSame($this->message2->read, $message2->read);
+        $this->assertSame($this->message2->text, $message2->text);
+    }
+
+    /**
+     * Tests that the Messages have the correct senders.
+     *
+     * @return void
+     */
+    public function testSenders(): void
+    {
+        $this->assertSame($this->user1->id, $this->message1->user->id);
+        $this->assertSame($this->user1->id, $this->message2->user->id);
+        $this->assertSame($this->user2->id, $this->message3->user->id);
+    }
+
+    /**
+     * Tests that the Messages have the correct receivers.
+     *
+     * @return void
+     */
+    public function testReceivers(): void
+    {
+        $this->assertSame($this->user2->id, $this->message1->receiver->id);
+        $this->assertSame($this->user2->id, $this->message2->receiver->id);
+        $this->assertSame($this->user1->id, $this->message3->receiver->id);
+    }
+
+    /**
+     * Tests that the Users have the correct sent Messages.
+     *
+     * @return void
+     */
+    public function testUserSentMessages(): void
+    {
+        $sentByUser1 = $this->user1->messagesSent->all();
+        $this->assertCount(2, $sentByUser1);
+        $this->assertSame($this->message2->id, $sentByUser1[0]->id);
+        $this->assertSame($this->message1->id, $sentByUser1[1]->id);
+
+        $sentByUser2 = $this->user2->messagesSent->all();
+        $this->assertCount(1, $sentByUser2);
+        $this->assertSame($this->message3->id, $sentByUser2[0]->id);
+    }
+
+    /**
+     * Tests that the Users have the correct received Messages.
+     *
+     * @return void
+     */
+    public function testUserReceivedMessages(): void
+    {
+        $receivedByUser1 = $this->user1->messagesReceived->all();
+        $this->assertCount(1, $receivedByUser1);
+        $this->assertSame($this->message3->id, $receivedByUser1[0]->id);
+
+        $receivedByUser2 = $this->user2->messagesReceived->all();
+        $this->assertCount(2, $receivedByUser2);
+        $this->assertSame($this->message1->id, $receivedByUser2[0]->id);
+        $this->assertSame($this->message2->id, $receivedByUser2[1]->id);
+    }
+
+    /**
+     * Tests that the user have the correct Messages.
+     */
+    public function testUserMessages(): void
+    {
+        $user1Messages = $this->user1->messages->all();
+        $this->assertCount(3, $user1Messages);
+        $this->assertSame($this->message3->id, $user1Messages[0]->id);
+        $this->assertSame($this->message1->id, $user1Messages[1]->id);
+        $this->assertSame($this->message2->id, $user1Messages[2]->id);
+
+        $user2Messages = $this->user2->messages->all();
+        $this->assertCount(3, $user2Messages);
+        $this->assertSame($this->message3->id, $user2Messages[0]->id);
+        $this->assertSame($this->message1->id, $user2Messages[1]->id);
+        $this->assertSame($this->message2->id, $user2Messages[2]->id);
+    }
+}