To put a shutter to multipurpose use without greatly modifying a conventional shutter body and a mount structure thereof.

A shutter body 1 can be separated into an end side separable portion 1a and a body side separable portion 1b by means of a slide fastener 5, and a shutter frame provided with a shutter rail for guiding the shutter body 1 is provided. And a storage section 3 of the body 1 in which a winding device of the body 1 is placed is disposed on the shutter frame and the body 1 is lowered to the lowermost point and the separable portion 1b is lifted, leaving the separable portion 1a as it is so that the portion 1a serves as a spandrel wall.