A switch comprising: a first contact placed so as to be capable of reciprocating in a first direction (X) along an operation axis and in a second direction (Y) opposite the first direction (X); a second contact placed on a side of the first direction (X) of the first contact so as to be capable of reciprocating along the operation axis in the first direction (X) and in the second direction (Y); an urging part to urge the second contact in the second direction (Y); an engaging part placed integrally with the second contact on the first direction side of the second contact ; a conductor part placed away from the engaging part in a direction perpendicular to the operation axis and electrically connected to the second contact ; a first magnetic material part surrounding the conductor part and made of a magnetic material; characterized by a second magnetic material part placed between the first magnetic material part and the engaging part and made of a magnetic material, wherein the second magnetic material part is placed at a position that causes, when no current flows through the conductor part, the second magnetic material part to engage with the engaging part to restrict the second contact from moving in the second direction (Y) due to the urging force of the urging part , a space is provided between the second magnetic material part and the first magnetic material part to allow the second magnetic material part to move to a side of the first magnetic material part , and the second magnetic material part moves to the first magnetic material part side so as to disengage from the engaging part . a first contact placed so as to be capable of reciprocating in a first direction (X) along an operation axis and in a second direction (Y) opposite the first direction (X); a second contact placed on a side of the first direction (X) of the first contact so as to be capable of reciprocating along the operation axis in the first direction (X) and in the second direction (Y); an urging part to urge the second contact in the second direction (Y); an engaging part placed integrally with the second contact on the first direction side of the second contact ; a conductor part placed away from the engaging part in a direction perpendicular to the operation axis and electrically connected to the second contact ; a first magnetic material part surrounding the conductor part and made of a magnetic material; characterized by a second magnetic material part placed between the first magnetic material part and the engaging part and made of a magnetic material, wherein the second magnetic material part is placed at a position that causes, when no current flows through the conductor part, the second magnetic material part to engage with the engaging part to restrict the second contact from moving in the second direction (Y) due to the urging force of the urging part , a space is provided between the second magnetic material part and the first magnetic material part to allow the second magnetic material part to move to a side of the first magnetic material part , and the second magnetic material part moves to the first magnetic material part side so as to disengage from the engaging part . <EOS>