PURPOSE: To make unlocking possible even when a key is forgotten or lost.

CONSTITUTION: In a door lock system where a locking or unlocking signal issued by operating a key is received, and a control section 4 controls a door lock driving section for locking or unlocking a door electric lock 6 provided in a car and the entrance, a light-emitting element and a light receiving element are matrix-shapedly arranged in the window frame part of a door, and a door touch panel 7 equipped with a number converting section 8 for converting a coordinate signal fed from the light receiving element into a number is connected to the control section 4. A password number storage section 9, an input number storage section 10 and a password number comparison section 11 are provided in the control section 4. The password number inputted from the door touch panel 7 is stored in an input number storage section 10 once, and the stored number is compared with the previously stored password number, and the locking and unlocking of the electric door lock is controlled on the result of the above comparison.