A shutter comprising: a pair of guide rails spaced apart in a first direction extending in a horizontal direction; a guide path extending in an extension direction of the pair of guide rails at a position between the pair of guide rails in the first direction; and an opening and closing body configured to move along the guide path, wherein the opening and closing body includes a plurality of rod-shaped members extending in the first direction and arranged at an interval in a guide direction extending along the guide path, and a plurality of coupling members disposed in the guide direction and configured to couple the plurality of rod-shaped members, opposite end portions of each of the plurality of rod-shaped members in the first direction are respectively guided by the pair of guide rails in such a manner as to be movable in the guide direction, each of the coupling members includes a pair of fitting parts that are spaced apart in the guide direction and configured to be fitted to a coupling target pair of rod-shaped members that are adjacent to each other in the guide direction, and each of the fitting parts includes a cover part being configured to cover a range of an outer circumferential surface of the fitted rod-shaped member, the range being smaller than a circumference of the outer circumferential surface and larger than half the circumference as viewed in the first direction characterized in that said cover part of each of the fitting parts has a flexibility allowing it to be pressed against the corresponding rod-shaped member from a direction orthogonal to the first direction in such a manner as to be fitted thereto, by enlarging a cut-out part, where the cover part is not formed, of the fitting part, in order to insert the rod-shaped member inside the cover part. a pair of guide rails spaced apart in a first direction extending in a horizontal direction; a guide path extending in an extension direction of the pair of guide rails at a position between the pair of guide rails in the first direction; and an opening and closing body configured to move along the guide path, wherein the opening and closing body includes a plurality of rod-shaped members extending in the first direction and arranged at an interval in a guide direction extending along the guide path, and a plurality of coupling members disposed in the guide direction and configured to couple the plurality of rod-shaped members, opposite end portions of each of the plurality of rod-shaped members in the first direction are respectively guided by the pair of guide rails in such a manner as to be movable in the guide direction, each of the coupling members includes a pair of fitting parts that are spaced apart in the guide direction and configured to be fitted to a coupling target pair of rod-shaped members that are adjacent to each other in the guide direction, and each of the fitting parts includes a cover part being configured to cover a range of an outer circumferential surface of the fitted rod-shaped member, the range being smaller than a circumference of the outer circumferential surface and larger than half the circumference as viewed in the first direction characterized in that said cover part of each of the fitting parts has a flexibility allowing it to be pressed against the corresponding rod-shaped member from a direction orthogonal to the first direction in such a manner as to be fitted thereto, by enlarging a cut-out part, where the cover part is not formed, of the fitting part, in order to insert the rod-shaped member inside the cover part.