To provide a shutter device with a locking device without requiring to accurately control an opening width of an opening part of a guide member for guiding the opening-closing movement of a shutter curtain.

A locking member 43 is arranged in the curtain 1, and a locking object part 60 is arranged inside a guide rail 3 of the curtain 1, respectively. The curtain 1 is locked by locking the locking member 43 on the locking object part 60 with a locking quantity L1 in the curtain thickness direction. A cover member 70 for covering an edge part 3D and abutting on the curtain 1 moved in parallel to the opposite side in the curtain thickness direction of the locking object part 60, is arranged in the end part 3D of an opening part 3C on the opposite side of the locking quantity increasing direction of the locking member 43 to the the locking object part 60, among both side edge parts 3D and 3E in the curtain thickness direction in the opening part 3C of the guide rail 3. An interval L2 between the curtain 1 and the cover member 70 is set smaller than the locking quantity L1.