To provide a sheet shutter which, when a shutter electrical unit is provided in a support post, prevents the shutter electrical unit from greatly projecting from the support post. The sheet shutter according to the present invention, which includes a sheet case, a support post arranged at each of the left and right end portions of the sheet case, a sheet guide section that is provided at each of left and right inner portions of the support posts to guide the lifting and lowering of the sheet, and a shutter electrical unit is featured in that a storage space which detachably accommodates and supports the shutter electrical unit along the direction of the support post is formed on the left and right outer side of the sheet guide section in the support post.