Abstract: Disclosed is a slide-type change-over switch for use in switching high-frequency electric circuits between TV and selected one of antenna or video tape recorder (or TV game appliance). The switch has a frame, a slider carrying a plurality of movable contacts, an insulating substrate plate carrying a plurality of fixed contacts including input, output, relaying and grounding contacts, and a shielding spring plate secured to the slider. The shielding spring plate has a pair of spring legs adapted to be positioned between the operating fixed output contact and the opened input fixed terminal not in use, so as to electromagnetically isolate these terminals from each other and prevent inductive coupling therebetween. In one embodiment, the shielding spring plate is further provided with a plurality of spring arms which form a shortened grounding path for the shielding spring leg, so as to lower the impedance of the path through which the shielding spring leg is grounded.