To provide a picking alarming lock receiver capable of having an effect for preventing crimes, sounding an alarm immediately after a picking is started, and making a door not easily openable even after the start of the picking to make a robber give up the picking since the robber can enter a room in a hurry to steal somethins in the room and runs away from the door even if the alarm is sounded after the door has been opened because a picking signal transmitted when the robber picks a locked door is sounded after the door has been opened due to the success in the picking.

A pickproof alarm switch is incorporated into a lock receiver, a bumper is combined with a receiving hole of the lock receiver. and when power exceeding a certain level is added in the opening direction of a locked door, the bumper is pushed by a dead bolt to bend, and an alarm switch is turned on. A lock receiving body is not damaged up to that point in time, and after that, it can strongly resist the picking.