Fixing device for vehicle

A fixing apparatus selectively connecting a cabin unit and a loading unit used for loading a cargo at a rear of the cabin unit for a vehicle, the fixing apparatus comprising:

• a coil generating an electromagnetic force;
• an assembly module including a drive pulley and mechanically fixing the cabin unit and the loading unit together through a driving force of the drive pulley via the coil for coupling the loading unit with the cabin unit;
• and
• a magnetic module enclosing the assembly module on an external side of the assembly module and including a magnetic body rotatably mounted to the assembly module,
• wherein the magnetic module is configured for magnetically fixing the cabin unit and the loading unit together by changing a magnetic circuit through a rotation force of the magnetic body while the cabin unit and the loading unit are mechanically connected to each other.