Provided is a switch 1 that can reliably bring contacts into contact with each other with a small load, and can be prevented from malfunctioning. The switch 1 is provided with a plunger 30, a lower torsion spring 50 in which a biasing direction changes according to the movement of the plunger 30. The lower torsion spring 50 biases the plunger 30 in an opposite direction to a returning direction when the plunger 30 is in the operation position, and biases the plunger 30 in a direction different from the opposite direction to the returning direction when the plunger 30 is in the reference position.