PURPOSE: To provide a burglary preventive device for vehicle which improve the burglary preventive property even to a burglar of the vehicle invading from a window.

CONSTITUTION: To a burglary preventive device for vehicle which has an unlock blocking means 100 to prevent the unlocking of the door of a locked vehicle, an unlock blocking condition detecting means 101 to detect that the vehicle door is in the unlock blocking condition by the unlock blocking means 100; a starting blocking means 102 to block the starting of the vehicle; and a control means 103 to block the starting of the vehicle by the starting blocking means 102 when the unlock blocking condition is detected by the unlock blocking condition detecting means 101; are provided.