To provide a relay with the size of a joint structure having a movable contact reduced and a main circuit energized, by stably and exactly bringing the movable contact into contact with fixed contacts even, after arcing occurs.

The relay includes a solenoid 10 constituted of a spool 11, a coil 12, and power supply connection terminals 13 to supply electric power to the coil; a sealed chamber 20 equipped with a cylinder 23 inserted into the center part of the spool at the lower end, equipped with a pair of fixed terminals each having the fixed contact 61, filled with insulating gas in the inside thereof, and joined to the upper part of the spool; a movable part 30, equipped with an insulating member 70 installed at the upper end of the chamber; a shaft 31 which moves toward the inside upper end face of the chamber; a movable terminal 32; and the movable contacts 33 at the upper end of the movable terminal; a restoring spring 40 which pulls out the shaft 31 to the lower end face of a cylinder; and a sliding guide 50 constituted of an insulator equipped inside the chamber.