A contacting plug for contacting a contract carrier, in particular a circuit board, includes two clamping claws able to be swiveled relative to each other, transversely to a plug-in direction, at least one of the clamping claws being implemented as contact holder carrying at least one flexible contact element, which contact holder is designed to rest on the contact carrier with a contact force and has spring devices for generating a clamping force which is independent of the contact force. The clamping claws have at least one stop face in each case, which rest against each other in the non-contacting state of the contacting plug and thereby prevent plastic deformation of the contact element.