An object of the present invention is to provide a vinyl extension aid for a greenhouse capable of performing a vinyl film extension operation in a greenhouse with a small number of people without using a high place. SOLUTION: A hollow steel pipe having a diameter of about 19 mm is processed into a U shape, and a straight pipe having a length of 70 to 80% of the distance from the waist pipe of the greenhouse to the ceiling pipe is joined to the center by welding or the like. In addition, the straight pipe is characterized in that an end of the straight pipe is joined with a short cut of an L angle material having a size suitable for a waist pipe of a greenhouse. [Selection] Figure 1【課題】ビニールハウスのビニールフィルムの展張作業を高所によることなく、少人数で行うことができるビニールハウスのビニール展張補助具を提供する。【解決手段】直径19mm程度の中空鋼管などをU字型に加工し、中心部にはビニールハウスの腰パイプから天井パイプの距離の7~8割の長さの直管が溶接などで接合されており、且つ直管の終端にはビニールハウスの腰パイプに適合する大きさのLアングル材を短く切ったものが接合されていることを特徴とする。【選択図】図1