To provide an anti-theft device for a vehicle for preventing theft and an accident of the vehicle in an engine started state.

The anti-theft device for vehicle is provided with a shift lock device for locking a shift lever at a prescribed position when a locking condition is realized and unlocking the shift lever to be moved from the prescribed position when an unlocking condition is realized, a shift lever position detecting means for detecting that the shift lever is at the prescribed position, and an getting-in and getting-off state detection means detecting if a user is in the vehicle or out of the vehicle. When the shift lever is positioned at the prescribed position in the engine operating state and the user is detected to be off the vehicle, the shift lever is locked at a prescribed operating position with the shift lock device.