The invention relates to an electromagnetic actuating apparatus with an armature unit, which is guided axially in a housing and is capable of being moved by means of energizing a coil apparatus, contact plug means, which are held in an insulator unit, being associated with the coil apparatus, and an elongated ground contact of the contact plug means being electrically conductively connected to the housing, and the ground contact interacting electrically conductively at an engagement end which is opposite its free end with a yoke section, which is associated with the housing preferably at the front end, in such a way that, in a fitted state, a cutout formed in the engagement end in the ground contact engages over a projection of the yoke section and/or at least partially surrounds it.