The burglarproof device for vehicle includes a portable transmitter having an unlock button for transmitting a preset first ID code, an immobilizer controller for receiving the first ID code from the portable transmitter, and collating the first ID code with a second ID code stored to permit the activation of a handle on the basis of a collation result thereof, and a system relay for permitting an engine operation on the basis of the collation result by the immobilizer controller, or disabling the engine operation on the basis of an operating state of the engine, and a fuel injection controller.