To provide a high-reliability and long-life relay capable of reducing a cost by using a micromachine technique.

This relay comprises: a passage formed by sticking two insulation members to each other and having narrow apertures and wide apertures; a plurality of liquid chambers formed by the apertures; a plurality of electrodes respectively arranged in the liquid chambers; first and second gas chambers arranged by communicating with both ends of the passage; a gas enclosed in the first and second gas chambers; a heating means for heating the gas; and a hole formed in one of the insulation members and communicating with the passage. A conductive fluid is introduced into the passage from the hole and the introduction port of the hole is sealed.