To simply clean the outside of a glass even from an indoor side of a building and prevent a water droplet from adhering on a window glass even on a rainy day.

This is an opening and closing sash 10 which is provided with a sash on the inside in which a glass G1 is fitted among an upper frame, a lower frame, a vertical frame on the outside, and a longitudinal frame on the outside and a sash 12 on the outside in which a glass G2 is fitted among the upper frame, the lower frame, the vertical frame on the outside, and the vertical frame 12d on the inside and opens and closes at least either of these sashes 12 in a horizontally sliding manner. A cleaning member 12 which cleans the glass G1 of the sash on the inside by coming into slide-contact with it from the outside is provided on the vertical frame 12d on the inside of the sash 12 on the outside through a first fixing member.