A contact mechanism comprising: an operating element reciprocally moving with respect to a housing; a movable contact terminal housed in the housing; a pair of movable contact pieces (37, 39) housed in the housing and mounted on the movable contact terminal in a juxtaposed manner such that the pair of movable contact pieces (37, 39) is rotatable along with reciprocation movement of the operating element; an open/close movable contact mounted on an open/close movable contact piece which forms a first movable contact piece of the movable contact pieces (37, 39); a current-passing movable contact mounted on a current-passing movable contact piece which forms a second movable contact piece of the movable contact pieces (37, 39); a fixed contact terminal housed in the housing and facing the movable contact terminal; an open/close fixed contact mounted on the fixed contact terminal so that the open/close movable contact is brought into contact with or separated from the open/close fixed contact; a current-passing fixed contact mounted on the fixed contact terminal so that the current-passing movable contact is brought into contact with or separated from the current-passing fixed contact; and a spring member mounted on the operating element, the spring being arranged to bias the open/close movable contact piece in a contact closing direction, wherein the contact mechanism is configured such that, with the reciprocation movement of the operating element, the open/close movable contact piece is rotated by bias of the spring member so as to bring the open/close movable contact into pressure contact with the open/close fixed contact, and the operating element rotates the current-passing movable contact piece so as to bring the current-passing movable contact into pressure contact with the current-passing fixed contact, characterized in that the contact mechanism further comprises a pedestal portion for restricting a position of the current-passing movable contact piece, the pedestal portion being formed in a base which is mounted on the housing, wherein the current-passing movable contact piece is operated by being pressed by an elastically biased operating piece, which is biased by the spring member and the movable contact piece is brought into pressure contact with the pedestal portion of the base. an operating element reciprocally moving with respect to a housing; a movable contact terminal housed in the housing; a pair of movable contact pieces (37, 39) housed in the housing and mounted on the movable contact terminal in a juxtaposed manner such that the pair of movable contact pieces (37, 39) is rotatable along with reciprocation movement of the operating element; an open/close movable contact mounted on an open/close movable contact piece which forms a first movable contact piece of the movable contact pieces (37, 39); a current-passing movable contact mounted on a current-passing movable contact piece which forms a second movable contact piece of the movable contact pieces (37, 39); a fixed contact terminal housed in the housing and facing the movable contact terminal; an open/close fixed contact mounted on the fixed contact terminal so that the open/close movable contact is brought into contact with or separated from the open/close fixed contact; a current-passing fixed contact mounted on the fixed contact terminal so that the current-passing movable contact is brought into contact with or separated from the current-passing fixed contact; and a spring member mounted on the operating element, the spring being arranged to bias the open/close movable contact piece in a contact closing direction, wherein the contact mechanism is configured such that, with the reciprocation movement of the operating element, the open/close movable contact piece is rotated by bias of the spring member so as to bring the open/close movable contact into pressure contact with the open/close fixed contact, and the operating element rotates the current-passing movable contact piece so as to bring the current-passing movable contact into pressure contact with the current-passing fixed contact, characterized in that the contact mechanism further comprises a pedestal portion for restricting a position of the current-passing movable contact piece, the pedestal portion being formed in a base which is mounted on the housing, wherein the current-passing movable contact piece is operated by being pressed by an elastically biased operating piece, which is biased by the spring member and the movable contact piece is brought into pressure contact with the pedestal portion of the base.