To provide a gas-insulated switch in which the outer diameter of a closed vessel can be made small.

In a gas insulation switch, where a fixed contact 3 covered with a metal shield 4 and a movable contact 2 which moves horizontally and comes into contact with the fixed contact 3 are accommodated in a closed vessel 1 together with insulating gas, a hole 17 for capturing conductive foreign matter 15, is formed in the lower part of the inner wall of the metal shield 4.