A solid insulated switchgear having at least one circuit switches for switching a three-pole AC circuit includes a plurality of bus-bars for pole (200). Each of the bus-bars for pole (200a, 200b, 200c) being providing correspondingly for each pole comprises a ring-shaped bus-bar portion (200a-1, 200b-1, 200c-1) electrically connecting the arc extinguishing mechanisms for the same pole, and each having an internal electrical conductor portion (200a-4) and an external solid insulated mold portion (200a-3) in which the conductor portion is built; and a plurality of extended connecting portions (200a-2, 200b-2, 200c-2) respectively extended from the ring-shaped bus-bar portion while being space apart from one another in a circumferential direction so that the plurality of circuit switches are connected in the state in which the plurality of circuit switches are separated from one another.