PURPOSE: To obtain an electromagnet with a resistance to a vibration without giving any influences due to the resilient force of a spring to a release body by independently providing an armature of the release body and an armature suffering the resilient force due to the spring.

CONSTITUTION: An armature 8 for a release body 7 and another armature 9 for pressing resiliently it with a spring 10 are independently provided on a yoke 1, the armature 9 of the spring side presses the armature 8 in the release body 7 in the inactive operation time, while the armature 8 is prevented from its malfunction by a spring 10 even in occurrence of the vibration. If an external signal is applied, the armature 9 in the spring side is attracted before a plunger 5 has been attracted to release the resilient force against the armature 8, successively the armature 8 is inversed to operate the release body 7 with a sevirus striking, and finally the armature 9 serves to push the armature 8 by a return spring 10. Whereby the resilient force of the spring is not given against the release body 7 and the device can fully resist against any vibration.