An optical connector to be connected to an external optical adapter in a given connecting direction, the optical connector comprising: an inner housing, on a surface of which engaging parts for engaging the optical adapter are provided; a boot connected to the inner housing in the connecting direction on a side opposite the optical adapter; and an outer housing (4,5) configured to cover the engaging parts and mounted on the inner housing to be freely movable in the connecting direction, wherein the engaging parts are exposed as the outer housing (4,5) moves to the boot side in the connecting direction, and characterized in that the outer housing (4,5) has cutout parts which are cut out in the connecting direction from an end part of the boot side and which a part of the boot enters, wherein: the outer housing includes a first outer housing configured to cover the engaging parts, and a second outer housing provided on the boot side of the first outer housing and provided to be freely movable relative to the first outer housing in the connecting direction; when the second outer housing moves in a direction approaching the first outer housing, the second outer housing and the inner housing move relative to the first outer housing, and thereby the engaging parts are exposed; when the second outer housing moves away from the first outer housing, the second outer housing and the first outer housing move relative to the inner housing, and thereby the engaging parts are exposed; and the second outer housing includes a grip part extending in a direction away from the second outer housing, wherein the grip part is freely mounted/demounted on/from the second outer housing, wherein: the grip part includes two engaging parts engaged with the second outer housing in the connecting direction; the second outer housing includes two engaged parts engaged with the respective two engaging parts; and the two engaged parts are provided on both sides of the cutout parts. an inner housing, on a surface of which engaging parts for engaging the optical adapter are provided; a boot connected to the inner housing in the connecting direction on a side opposite the optical adapter; and an outer housing (4,5) configured to cover the engaging parts and mounted on the inner housing to be freely movable in the connecting direction, wherein the engaging parts are exposed as the outer housing (4,5) moves to the boot side in the connecting direction, and characterized in that the outer housing (4,5) has cutout parts which are cut out in the connecting direction from an end part of the boot side and which a part of the boot enters, wherein: the outer housing includes a first outer housing configured to cover the engaging parts, and a second outer housing provided on the boot side of the first outer housing and provided to be freely movable relative to the first outer housing in the connecting direction; when the second outer housing moves in a direction approaching the first outer housing, the second outer housing and the inner housing move relative to the first outer housing, and thereby the engaging parts are exposed; when the second outer housing moves away from the first outer housing, the second outer housing and the first outer housing move relative to the inner housing, and thereby the engaging parts are exposed; and the second outer housing includes a grip part extending in a direction away from the second outer housing, wherein the grip part is freely mounted/demounted on/from the second outer housing, wherein: the grip part includes two engaging parts engaged with the second outer housing in the connecting direction; the second outer housing includes two engaged parts engaged with the respective two engaging parts; and the two engaged parts are provided on both sides of the cutout parts. the outer housing includes a first outer housing configured to cover the engaging parts, and a second outer housing provided on the boot side of the first outer housing and provided to be freely movable relative to the first outer housing in the connecting direction; when the second outer housing moves in a direction approaching the first outer housing, the second outer housing and the inner housing move relative to the first outer housing, and thereby the engaging parts are exposed; when the second outer housing moves away from the first outer housing, the second outer housing and the first outer housing move relative to the inner housing, and thereby the engaging parts are exposed; and the second outer housing includes a grip part extending in a direction away from the second outer housing, wherein the grip part is freely mounted/demounted on/from the second outer housing, wherein: the grip part includes two engaging parts engaged with the second outer housing in the connecting direction; the second outer housing includes two engaged parts engaged with the respective two engaging parts; and the two engaged parts are provided on both sides of the cutout parts. the grip part includes two engaging parts engaged with the second outer housing in the connecting direction; the second outer housing includes two engaged parts engaged with the respective two engaging parts; and the two engaged parts are provided on both sides of the cutout parts.