PURPOSE: To provide a gas-insulated switchgear in which an access to a service space is facilitated for operation, maintenance and inspection of a breaker or a disconnector and a complicated design structure is eliminated for mounting the damaged breaker or disconnector.

CONSTITUTION: In a gas-insulated switchgear comprising a bus connection of 11/2 breaker type, three breakers 111c, 131c and 121c of each phase are formed in a U-shape at a mutually right angle, and the breakers 111c and 121c of both ends are arranged parallel to buses 1 and 2. Also, a lead-in bushing 5C and a lead-out bushing 6C are installed parallel to a perpendicular line at the intersection extending a center line of a longitudinal direction of the breakers 111c, 131c and 121c. Further, the buses 1 and 2 and disconnectors 112c, 113c, 132c, 133c, and 122c are placed on a higher position than the breakers 111c, 131c and 121c to a setting plane.