A switch comprising: a first fixed contactor (1a,11a,17a); a second fixed contactor (1b,11b,17b) disposed at a predetermined interval from the first fixed contactor (1a,11a,17a); and a blade (2,12,16) having one end portion which is pivotally attached to the first fixed contactor (1a,11a,17a), and another end portion which is joined to the second fixed contactor (1b,11b,17b) by rotational operation by an operation device to bridge and electrically connect the first and second fixed contactors (11a,11a,17a,1b,11b,17b), wherein the one end portion of the blade (2,12,16) is brought into pressure contact with the first fixed contactor (1a,11a,17a), the other end portion of the blade (2,12,16) is brought into pressure contact with the second fixed contactor (1b,11b,17b) by a first contact-pressure spring in a state where the other end portion is joined to the second fixed contactor (1b,11b,17b), at least one slit is provided in each of a conductive contact surface (Spa,Spb), with respect to the first fixed contactor (1a,11a,17a), of the one end portion of the blade (2,12,16) and a conductive contact surface(SFa,SFb), with respect to the second fixed contactor (1b,11b,17b), of the other end portion of the blade (2,12,16), or in each of a conductive contact surface, with respect to the one end portion of the blade (2,12,16), of the first fixed contactor (1a,11a,17a) and a conductive contact surface, with respect to the other end portion of the blade (2,12,16), of the second fixed contactor (1b,11b,17b), so as to divide each of the conductive contact surfaces, a thickness of a contact-pressure spring fixing portion of the blade (2,12,16) at which the first contact-pressure spring is provided is smaller than that of the other end portion of the blade (2,12,16) which is joined to the second fixed contactor (1b,11b,17b), a second contact-pressure spring is provided at the one end portion of the blade (2,12,16), and a thickness of the one end portion of the blade (2,12,16) is smaller than that of the other end portion of the blade (2,12,16). a first fixed contactor (1a,11a,17a); a second fixed contactor (1b,11b,17b) disposed at a predetermined interval from the first fixed contactor (1a,11a,17a); and a blade (2,12,16) having one end portion which is pivotally attached to the first fixed contactor (1a,11a,17a), and another end portion which is joined to the second fixed contactor (1b,11b,17b) by rotational operation by an operation device to bridge and electrically connect the first and second fixed contactors (11a,11a,17a,1b,11b,17b), wherein the one end portion of the blade (2,12,16) is brought into pressure contact with the first fixed contactor (1a,11a,17a), the other end portion of the blade (2,12,16) is brought into pressure contact with the second fixed contactor (1b,11b,17b) by a first contact-pressure spring in a state where the other end portion is joined to the second fixed contactor (1b,11b,17b), at least one slit is provided in each of a conductive contact surface (Spa,Spb), with respect to the first fixed contactor (1a,11a,17a), of the one end portion of the blade (2,12,16) and a conductive contact surface(SFa,SFb), with respect to the second fixed contactor (1b,11b,17b), of the other end portion of the blade (2,12,16), or in each of a conductive contact surface, with respect to the one end portion of the blade (2,12,16), of the first fixed contactor (1a,11a,17a) and a conductive contact surface, with respect to the other end portion of the blade (2,12,16), of the second fixed contactor (1b,11b,17b), so as to divide each of the conductive contact surfaces, a thickness of a contact-pressure spring fixing portion of the blade (2,12,16) at which the first contact-pressure spring is provided is smaller than that of the other end portion of the blade (2,12,16) which is joined to the second fixed contactor (1b,11b,17b), a second contact-pressure spring is provided at the one end portion of the blade (2,12,16), and a thickness of the one end portion of the blade (2,12,16) is smaller than that of the other end portion of the blade (2,12,16).