Device with a shutter and element for the reinsertion of a shutter into a guide slide. Device with a shutter for the closing-off of a bay (1), comprising a slide (7, 8); a deformable shutter (3) comprising a lateral flange (10, 11, 27) which is mounted slidingly in the slide; and a means for reinserting the flange into the slide, after it has been pulled out of the slide, this means comprising at least one pair of rollers (17) which are placed on either side of the shutter and which, while the shutter is moved opposite the bay in order to uncover the latter, roll on the flange which has come out of the slide and push it back into the latter.