PROBLEM TO BE SOLVED: To provide: a method of producing a surface-modified fluororesin film that does not exhibit coloring apparently and can be easily bonded to rubber without applying an organic adhesive a surface-modified fluororesin film a method of producing a composite of the surface-modified fluororesin film and the rubber a composite of the surface-modified fluororesin film and the rubber and a medical rubber product.SOLUTION: The method of producing a surface-modified fluororesin film is achieved by sequentially performing: (1) a step to perform atmospheric pressure plasma processing using noble gas and to introduce a peroxide functional group onto the surface of a fluororesin film (2) a step to immerse the fluororesin film in water and to form a hydrophilic group on the surface of the fluororesin film (3) a step to perform film formation processing of an organic silane compound and to form a self-organizing film of the organic silane compound on the surface of the fluororesin film and (4) a step to perform pressure-reducing and drying processing and to remove the unreacted organic silane compound from the fluororesin film.COPYRIGHT: (C)2013,JPO&INPIT【課題】外観上着色が認められず、かつ有機系接着剤を塗布することなく容易にゴムと接着できる表面改質フッ素樹脂フィルムの製造方法、表面改質フッ素樹脂フィルム、表面改質フッ素樹脂フィルムとゴムとの複合体の製造方法、表面改質フッ素樹脂フィルムとゴムとの複合体、及び医療用ゴム製品を提供する。【解決手段】希ガスを用いた大気圧プラズマ処理を施して、フッ素樹脂フィルム表面に過酸化物官能基を導入する工程(1)、上記フッ素樹脂フィルムを水に浸漬して、上記フッ素樹脂フィルム表面に親水基を形成する工程(2)、有機シラン化合物の成膜処理を施して、上記フッ素樹脂フィルム表面に上記有機シラン化合物の自己組織化膜を形成する工程(3)、減圧乾燥処理を施して、上記フッ素樹脂フィルムから未反応の上記有機シラン化合物を除去する工程(4)、を順次行う表面改質フッ素樹脂フィルムの製造方法に関する。【選択図】図1