PROBLEM TO BE SOLVED: To provide a friction prevention tool for a plastic greenhouse which can make a friction prevention cover hard to come off with respect to a frame body, and can improve attaching workability of the friction prevention cover.SOLUTION: A friction prevention tool of the present invention is a friction prevention tool A for a plastic greenhouse for preventing friction of a sheet 3 locked by an elastic wire material 4 in a frame body 2. The friction prevention tool comprises a clip 7 attached to the elastic wire material, and a friction prevention cover 5 engaged to an engaging part 13 provided on the clip.【課題】枠体に対して擦れ防止カバーを外れ難くでき、且つ擦れ防止カバーの取付け作業性を向上させることができるビニールハウスの擦れ防止具を提供する。【解決手段】本擦れ防止具は、枠体2内に弾性線材4で係止されるシート3の擦れを防止するためのビニールハウスの擦れ防止具Aであって、弾性線材に取り付けられるクリップ7と、クリップに設けられた係止部13に係止される擦れ防止カバー5と、を備える。【選択図】図3