A micro-relay includes a first substrate having stationary contacts and a stationary electrode, a second substrate arranged so as to face the first substrate, and a movable plate arranged between the first and second substrates. The movable plate has a frame and a movable portion. The frame is sandwiched between the first and second substrates to realize a hermetical sealed structure. The movable portion has a movable electrode facing the stationary electrode, and a movable contact faces the stationary contacts. The movable portion moves between the first and second substrates due to electrostatic attraction that develops between the movable electrode and the stationary electrode.