diff --git a/odoo_whatsapp_hub/models/whatsapp_message.py b/odoo_whatsapp_hub/models/whatsapp_message.py
new file mode 100644
index 0000000..b4091b6
--- /dev/null
+++ b/odoo_whatsapp_hub/models/whatsapp_message.py
@@ -0,0 +1,116 @@
+from odoo import models, fields, api
+import requests
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+class WhatsAppMessage(models.Model):
+    _name = 'whatsapp.message'
+    _description = 'WhatsApp Message'
+    _order = 'create_date desc'
+
+    external_id = fields.Char(string='ID Externo', index=True)
+    conversation_id = fields.Many2one(
+        'whatsapp.conversation',
+        string='Conversación',
+        required=True,
+        ondelete='cascade',
+    )
+    direction = fields.Selection([
+        ('inbound', 'Entrante'),
+        ('outbound', 'Saliente'),
+    ], string='Dirección', required=True)
+    message_type = fields.Selection([
+        ('text', 'Texto'),
+        ('image', 'Imagen'),
+        ('audio', 'Audio'),
+        ('video', 'Video'),
+        ('document', 'Documento'),
+        ('location', 'Ubicación'),
+        ('contact', 'Contacto'),
+        ('sticker', 'Sticker'),
+    ], string='Tipo', default='text')
+    content = fields.Text(string='Contenido')
+    media_url = fields.Char(string='URL Media')
+    status = fields.Selection([
+        ('pending', 'Pendiente'),
+        ('sent', 'Enviado'),
+        ('delivered', 'Entregado'),
+        ('read', 'Leído'),
+        ('failed', 'Fallido'),
+    ], string='Estado', default='pending')
+    is_read = fields.Boolean(string='Leído', default=False)
+    sent_by_id = fields.Many2one(
+        'res.users',
+        string='Enviado por',
+    )
+    error_message = fields.Text(string='Error')
+
+    @api.model
+    def create(self, vals):
+        message = super().create(vals)
+        if message.conversation_id:
+            message.conversation_id.write({
+                'last_message_at': fields.Datetime.now(),
+            })
+        return message
+
+    def action_resend(self):
+        """Resend failed message"""
+        self.ensure_one()
+        if self.status != 'failed':
+            return
+
+        self._send_to_whatsapp_central()
+
+    def _send_to_whatsapp_central(self):
+        """Send message via WhatsApp Central API"""
+        self.ensure_one()
+        account = self.conversation_id.account_id
+
+        try:
+            response = requests.post(
+                f'{account.api_url}/api/whatsapp/conversations/{self.conversation_id.external_id}/messages',
+                headers=account._get_headers(),
+                json={
+                    'type': self.message_type,
+                    'content': self.content,
+                    'media_url': self.media_url,
+                },
+                timeout=30,
+            )
+
+            if response.status_code == 200:
+                data = response.json()
+                self.write({
+                    'external_id': data.get('id'),
+                    'status': 'sent',
+                    'error_message': False,
+                })
+            else:
+                self.write({
+                    'status': 'failed',
+                    'error_message': response.text,
+                })
+
+        except Exception as e:
+            _logger.error(f'Error sending WhatsApp message: {e}')
+            self.write({
+                'status': 'failed',
+                'error_message': str(e),
+            })
+
+    @api.model
+    def send_message(self, conversation_id, content, message_type='text', media_url=None):
+        """Helper to send a new message"""
+        message = self.create({
+            'conversation_id': conversation_id,
+            'direction': 'outbound',
+            'message_type': message_type,
+            'content': content,
+            'media_url': media_url,
+            'sent_by_id': self.env.user.id,
+        })
+        message._send_to_whatsapp_central()
+        return message