When an insertion groove, into which various parts are inserted, is formed on a sealing member, the present disclosure may maintain a width of an opening of the insertion groove greater than or equal to a predetermined width, facilitating the insertion. A sealing member 30 includes an insertion groove S opening toward an outside of a compartment. A protruding portion 36b is formed on a side face S1 of the insertion groove S, and protrudes toward another side face S2. The protruding portion 36b is connected to the other side face R2 via a connecting portion 36c smaller in strength.