GAS-INSULATED SWITCHING DEVICE

A gas-insulated switchgear including a circuit breaker 1 arranged horizontally, a connection bus bar 6 connected to a branch outlet 2a, a disconnect switch 5a connected to the connection bus bar 6 and arranged coaxially with the branch outlet 2a, a disconnect switch 5b that is connected to the branch outlet 2b, that is arranged coaxially with the branch outlet 2b, and that is arranged at a lower position than a position of the disconnect switch 5a, a line bus bar 10 led out from the disconnect switch 5b in a horizontal direction, a main bus bar 7 that is arranged above the disconnect switch 5b coaxially with the branch outlet 2b, that is connected to the disconnect switch 5a, and that extends in the horizontal direction orthogonal to a longitudinal direction of the circuit breaker 1, and an abutment 8 fixed to a top portion of the disconnect switch 5b and supporting the main bus bar 7 from below.