PROBLEM TO BE SOLVED: To provide a film for supporting a patch that, while suppressing the labor hour and cost during production, has excellent strength and extensibility, and a laminate and a patch using the film.SOLUTION: A film 1 for supporting a patch having a support layer 2 capable of disposing an adhesive layer 6 on one surface side. The support layer 2 has an uneven structure 4 in which a concave part 2A and a convex part 2B are repeated along a surface. The uneven structure 4 has a difference of elevation between the concave part 2A and the convex part 2B larger than a thickness of the support layer 2, a rear layer 3 is laminated on the other surface that is a surface on the opposite side from one surface of the support layer 2, the tensile elasticity of the rear layer 3 is lower than that of the support layer 2, the adhesion strength between the support layer 2 and the rear layer 3 is 0.3 N/15 mm or larger according to a 180° peel test, the thickness of the rear layer 3 is larger than the thickness of the support layer 2 at a position of the convex part 2B, and a total thickness of the film 1 for supporting a patch at the position of the convex part 2B is in a range of larger than 15 μm and smaller than 450 μm.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】製造時の手間やコストを抑えつつ、強度と伸び性が良好である貼付剤支持体用フィルム、及びこれを用いた積層体、貼付剤を提供する。【解決手段】粘着剤層６を一方の面側に配置可能な支持層２を有する貼付剤支持体用フィルム１である。支持層２は、面に沿って凹部２Ａと凸部２Ｂを繰り返す凹凸構造４を有す。凹凸構造４は、凹部２Ａと凸部２Ｂとの高低差が支持層２の厚さよりも大きく、支持層２の一方の面とは反対側の面である他方の面に裏面層３が積層し、裏面層３の引張弾性率は、支持層２の引張弾性率よりも低く、支持層２と裏面層３との密着強度は、１８０°剥離試験で０．３Ｎ／１５ｍｍ以上であり、凸部２Ｂ位置において、裏面層３の厚さは支持層２の厚さよりも厚く、凸部２Ｂ位置における貼付剤支持体用フィルム１の総厚が、１５μｍより大きく４５０μｍ以下の範囲である。【選択図】図１
