The present invention provides a film, which solves the problem, and has excellent adhesion suitability and excellent processing suitability when the film is used as organic EL display devices and isused for organic EL illumination. According to the present invention, the film is arranged on the organic EL non-light-emitting surface side in organic EL display devices and organic EL illumination,the thickness of the film is more than 5 [mu]m and is less than 300 [mu]m, and the MD direction thermal shrinkage Hm in the film length direction and the TD direction thermal shrinkage Ht in the widthdirection of the film being subjected to heat treatment for 30 min at a temperature of 150 DEG C meet the following formulas [1] and [2], wherein the formula [1] is that |Hm| is more than or equal to0 and is less than or equal to 0.7, and the formula [2] is that |Ht| is more than or equal to 0 and is less than or equal to 0.7.