PROBLEM TO BE SOLVED: To provide an air membranous film which has an expanding/contracting configuration and enables room temperature control at the same level as conventional one with a conventional facility.SOLUTION: An air membranous film is obtained by forming an appropriate number of exhaust holes with appropriate sizes at appropriate positions at appropriate intervals in a longitudinal direction, on at least either one of the inside and outside films of an agricultural film prepared by superimposing its antifog-treated sides while put in the forward direction.【課題】慣行設備で慣行並みの室温調節ができる膨縮形態を備えた空気膜フイルムを提供する。【解決手段】防曇処理面を順方向にして重ねた農業用フイルムの少なくとも内外面フイルムのいずれかには長手方向適当な位置に適当な大きさの排気穴を適当間隔に適当数設けた空気膜フイルムである。【選択図】図２－１
