There is provided a novel switch having a function of overcurrent protection. In a switch comprising a conductive movable member (9) and at least two terminals (1, 2, 3) and being switchable by mechanically moving the movable member (9) between a state in which the movable member (9) contacts with the two terminals (1, 2) simultaneously and a state in which the movable member (9) is apart from either one (1) of the two terminals (1, 2), at least one (2) of the two terminals (1, 2) is separated into a conductive contact part (2a) for contacting with the movable member (9) and a conductive connect part (2b) for being electrically connected with an external element (not shown), and a PTC member (2b) is located between the contact part (2a) and the connect part (2c). The PTC member (2b) may be a PTC element having a PTC material layer and a pair of conductive material layers each located on opposed surfaces of the PTC material layer.