PURPOSE: To prevent a curtain from being creased when the curtain composed of parallel fabric sheets interconnected by a series of spaced vanes is wound up by forming a recessed section between the curtain and the take-up roller of the curtain by providing at least three projections on the surface of the roller and attaching an elastic clip to the roller.

CONSTITUTION: Projections 12, 16, and 24 are provided on the surface of a roller 120 which is inserted into the space formed of the vanes 64 of a curtain composed of parallel fabric sheets 60 and 62 interconnected by a series of spaced vanes 64 at peripheral intervals of about 120°. Then a clip 30 made of an elastic material is attached to the outside of the roller 10. In addition, a recessed section which does not press a buckling section produced when the curtain having different lengths is wound up is formed. Therefore, the creasing of the curtain can be prevented.