There is provided a main circuit switchgear that includes a breaker; a leg part that supports the breaker; a disconnector that is connected to the breaker; a leg part that supports the disconnector; a metal container that accommodates therein the breaker and the disconnector and includes a bottom plate in which an opening is provided at a position corresponding to a position of the leg part, where the leg part is fixed onto the bottom plate, and a support frame that includes a top panel on which the bottom plate is placed and a leg part that supports the top panel, where the leg part is fixed onto the top panel via the opening.