Abstract: A switch device suitable for switching superhigh-speed signals is disclosed which comprises a row of fixed contacts formed by having a plurality of fixed contacts arranged as regularly spaced, a conductive plate disposed above and along the row of fixed contacts, a movable contact formed as bent substantially in the shape of the letter W incorporating therein a first curve located at the center and held in contact with the row of fixed contacts and second curves located at the outer sides and held in contact with the conductive plate, and a holder disposed between the conductive plate and the row of fixed contacts and adapted to accommodate therein the movable contact, whereby the holder is enabled to push one of the end parts of the movable contact and the movable contact is consequently enabled to move in conjunction with the holder. The movable contact is further provided at the opposite end parts thereof with third curves adapted to come into contact with the holder.