Abstract: The present invention is a burglar alarm activated by the movement of an article to be secured. The burglar alarm comprises a housing, a movement-detecting transducer, electronics for processing a signal from the transducer, a battery and an alarm buzzer or radio transmitter. Elements for activating and deactivating the burglar alarm are also included. In the preferred embodiment, the detecting transducer comprises an acceleration transducer in the preferred embodiment. In particular, the present invention is characterized in that the alarm housing includes a hole for coupling the alarm to a bolt- or rod-shaped element which is included in an article to be secured. The activating and deactivating elements are associated with the hole so as to automatically activate the alarm to action readiness and forcibly maintain the alarm in action readiness when the bolt- or rod-shaped element of the article to be secured is in the hole.