Abstract: A slipper having an upper sheet 4 and a lower sheet 5, which are adhered together to form a sole. To the upper sheet 4 are attached two band parts 6L and 6R which can be folded parallely against upper sheet 4. Attachment slots 7, into which the lateral edges of band parts 6L and 6R can be inserted, are also provided on upper sheet 4. Furthermore, an auxiliary sheet 8 is provided between upper sheet 4 and lower sheet 5 so as to be in contact with the lower faces of band parts 6L and 6R, which have been inserted into attachment slot 7, and the lower face of upper sheet 4. The auxiliary sheet 8 and the lateral edges of band parts 6L and 6R are sewn together along attachment slot 7 by means of stitch 9.