PURPOSE: To eliminate the troubles of setting by providing a burglar alarm device body which is set based on an output of a first OR gate and which is reset based on the output of a second OR gate.

CONSTITUTION: If either of a door unlock action signal from a control circuit 15 or a reset signal from a second switch 30 which acts in association with an ignition switch is supplied to a first OR gate 32, a reset signal is supplied to a reset terminal of a microcomputer 22. And if a door lock action signal from the circuit 15 and an ON signal from a first switch 31 which acts when a lock knob is in a door locked state are supplied to a second OR gate 33, a door lock command signal is outputted to an AND gate 21 to reset the microcomputer 22. By this method, a burglar alarm device body 27 is set and set sound at the time of setting is delivered from a buzzer 24.