SASH

PROBLEM TO BE SOLVED: To provide a sash, regarding a stile constituting a paper screen of the sash, which can maintain a condition where an indoor side surface is unfailingly abutted to an airtight material of a vertical frame by preventing indoor and outdoor directional vibration at the occurrence of a fire so as to prevent the occurrence of a gap.SOLUTION: Right and left vertical frames 12 respectively have an intermediate fin 12d that is formed to protrude toward an inner sash 2 in a closed state or toward the outer peripheral surface of an outer sash 3 and an indoor fin 12f that is formed to protrude from the intermediate fin 12d from an indoor side and face the indoor side of the inner sash 2 or the outer sash 3, on the inner peripheral surface 12a, and a stile 22 has a vertical inclined plane 24b that is formed to face the intermediate fin 12d of the vertical frame 12 on an outer peripheral surface. The vertical inclined plane 24b is formed of metallic material and also formed like an inclined plane which is directed from the outdoor inner peripheral side to the indoor outer peripheral side.