To provide a seat type door such as a sliding door and a door, commonly installed, easy to install, automatically closed after opening, attached to an entrance not requiring locking, for a pet, a factory, a livestock bar or the like.SOLUTION: One side out of both sides of a rectangular sheet 1 is fixed to one pillar of a pillar, a construction frame, or a door of a closing door to be closed, and faces a side of the other sheet 1 which is not fixed Attach a draft shield 2 to close the gap to the door of a sliding door, the door of a door, the building frame, etc. as a door.(FIG.【課題】引戸にもドアにも共用できるうえ、取り付けが容易な、開けた後に自動で閉まる、施錠が不要な出入口に取り付けるペット用、工場用、畜舎用等のシート式扉を提供する。【解決手段】矩形シート1の両側辺のうちの一辺を柱、建枠、或いは、閉じ合わされる引き分け戸の一方の戸先に固定し、固定していないもう一方のシート1の側辺と向かい合う引戸の戸先、ドアの戸先、建枠等に隙間を塞ぐ風防2を取り付けて扉とする。【選択図】図1
