A switch for a vehicle used to control the on-off operation of a stop lamp for an automobile ensures electrical contact and separation with a simple structure. The switch includes an input terminal and an output terminal each protruded outside the case at one end and is disposed in the case at the other end. Between the input terminal and the output terminal is disposed a switching unit having an input part, an output part, and a signal input part. The input part and the output part are connected to the input terminal and the output terminal, respectively. Between the signal input part of the switching unit and the input terminal is disposed a switch contact, which slides to perform electrical contact and separation in response to the vertical motion of the operating body accommodated in the case.