PURPOSE: To provide a good winding roll having no wrinkling from a cross- linked elastomer film.

CONSTITUTION: When a laminated film having nonadhesive protecting films releasably arranged on both surface of a cross-linked elastomer film (silicon film or the like) having a thickness less than 500μm is wound in roll, the bending moment of the protecting film on the outer winding side is set smaller than the bending moment of the protecting film on the inner winding side. When a one of the same kind is used as both the protecting films, the thickness ratio of outer/inner protective films is preferably set lower than 0.8. Thus, the wound film roll has no wrinkling, and the handling property of the elastomer film is enhanced.