A wireless power transmission device for a vehicle is provided. The wireless power transmission device according to an exemplary embodiment of the present invention comprises: a wireless power transmission module comprising at least one flat coil for transmitting wireless power and a magnetic field shielding sheet arranged on one surface of the flat coil; a heat radiating case for radiating heat generated by a heat source, with the wireless power transmission module being coupled to one side thereof and at least one circuit board for driving the wireless power transmission module being embedded therein; a heat radiating coating layer applied to the outer surface of the heat radiating case; and a cover detachably coupled to the heat-radiating case. The wireless power transmission device for the vehicle described above may be installed or embedded within a vehicle for using in charging the main battery of a portable terminal.