To provide a crime prevention alarm for always and surely achieving alarm effects in emergency.

This crime prevention alarm 11 is configured of a buzzer 13, into which a freely attachable/detachable pen 26 is inserted for issuing a sound, in response to the detaching operation of the pin 26 and a whistle 15 connected to the external end side of the pin 26. When a first inspection button 21 set in the buzzer 13 is depressed, a sound is generated from a speaker 18, when the sound issuing means is operating normally. When a second inspection button 22 is depressed, an LED 23 is turned on, when a battery housed inside the buzzer 13 is not consumed. Thus, an alarm sound, whose volume is large can be surely issued from the buzzer 13 by pulling out the pin 26 in emergency by endeavoring to use these inspection buttons at each time of use.