PURPOSE: To facilitate an escape from a crashed car by emitting a door lock releasing signal to a door locking-unlocking means at a time when a car crash is detected, and releasing the door-lockedness in a forcible manner.

CONSTITUTION: A door lock forcibly releasing means 1 1 outputs a door lock releasing signal to a door locking-unlocking mechanism 6 at a time when an impact detecting sensor 5 has detected a car crash, thereby releasing the door- lockedness forcibly. During the output of this door lock releasing signal from the door lock forcibly releasing means 11 on the basis of this impact detection, any automatic door lock control by an auto door lock control means 13 is prohibited. Likewise, after actuation of the door lock forcibly releasing control, any centralized door lock control by a centralized door lock control means 12 is prohibited during the output of the door lock releasing signal from the door lock forcibly releasing means 11, namely, it is prohibited till an ignition key switch 4 is turned on again. With this constitution, a door lock forcibly releasing system can be done accurately in a moment.