A vacuum insulation switchgear comprising: a cabinet including a switching device section with an operation mechanism portion placed thereunder, a bus section (1 a) in which a bus is placed, a cable section (1 c) in which a cable is placed, and a control section (1 d), each of the sections being partitioned by a grounded metal plate; a mold switch installed in the switching device section and obtained by integrally molding a vacuum break switch having an interrupting function and a three-position disconnecting switch having a disconnection/earthing function, the switches being operated by the operation mechanism portion; a mold switch securing member securing the mold switch in the cabinet; and a switching device support member supporting and securing the mold switch securing member; in which vacuum insulation switchgear, the bus section (1 a) is formed above the central part of the cabinet, the switching device section (1 b) is formed below the bus section (1 a), the cable section (1 c) is formed on the rear face side of the cabinet, and the control section (1 d) is formed on the front face side of the cabinet and a bus-side bushing projected in the height direction of the mold switch and the bus are connected with each other and a cable-side bushing projected in the horizontal direction of the mold switch and the cable are connected with each other; wherein the spacing between the mold switch and the operation mechanism portion placed thereunder is shorter than a length of the bus-side bushing projected in the height direction of the mold switch; characterized in that the mold switch securing member is removably connected to the switching device support member by a removable fastening member, and that the mold switch securing member is configured such that it can be pulled upward by an amount equal to or larger than the length of the bus-side bushing projected in the height direction of the mold switch. a cabinet including a switching device section with an operation mechanism portion placed thereunder, a bus section (1 a) in which a bus is placed, a cable section (1 c) in which a cable is placed, and a control section (1 d), each of the sections being partitioned by a grounded metal plate; a mold switch installed in the switching device section and obtained by integrally molding a vacuum break switch having an interrupting function and a three-position disconnecting switch having a disconnection/earthing function, the switches being operated by the operation mechanism portion; a mold switch securing member securing the mold switch in the cabinet; and a switching device support member supporting and securing the mold switch securing member; in which vacuum insulation switchgear, the bus section (1 a) is formed above the central part of the cabinet, the switching device section (1 b) is formed below the bus section (1 a), the cable section (1 c) is formed on the rear face side of the cabinet, and the control section (1 d) is formed on the front face side of the cabinet and a bus-side bushing projected in the height direction of the mold switch and the bus are connected with each other and a cable-side bushing projected in the horizontal direction of the mold switch and the cable are connected with each other; wherein the spacing between the mold switch and the operation mechanism portion placed thereunder is shorter than a length of the bus-side bushing projected in the height direction of the mold switch; characterized in that the mold switch securing member is removably connected to the switching device support member by a removable fastening member, and that the mold switch securing member is configured such that it can be pulled upward by an amount equal to or larger than the length of the bus-side bushing projected in the height direction of the mold switch.