To provide a door guard driving device capable of enhancing a crime preventive effect by positively utilizing a door guard even when leaving home.

The door guard driving device 9, which is fitted on an indoor side of a front door 1 together with a door guard 20 to bring the door guard 20 into a locked state or unlocked state, includes a locking operation part 11 for accepting the locking operation, an unlocking operation part 12 for accepting the unlocking operation, a locking mechanism 13 bringing the door guard 20 into the locked state after a predetermined time from the locking operation, and an unlocking mechanism 14 bringing the door guard 20 into the unlocked state after a predetermined time from the unlocking operation.