An electromagnetic vibrator, includes a pair of electromagnets each having a core of E-configuration to define three parallel legs joined together at one side by a bridge, and a coil on the middle leg. The electromagnets are secured together with their bridges facing outwardly and with their legs aligned with, but spaced from, each other. A plunger carrying magnetisable material is disposed within the space between the legs of the electromagnets such as to be movable along the longitudinal axis of the plunger upon the energization of the coils of the electromagnets. A pair of springs yieldingly mount the opposite ends of the plunger to the electromagnets, each spring being yieldable in the direction of the longitudinal axis of the plunger and stiff in the direction of the transverse axis of the plunger.