A connector , comprising: a housing that houses a connection terminal ; an outer case that houses and holds the housing ; a movable case that includes first cam grooves formed penetratingly in side walls of the movable case corresponding to each of both side walls of the outer case , and that is movably disposed inside the outer case in a connector fitting direction; a shutter including a shutter front wall that covers a front opening of the housing to which a mating connector is fitted, shutter side walls provided at both end portions of the shutter front wall , and shutter bosses projecting to outer surfaces of the shutter side walls and engaging with the first cam grooves ; and a spring that elastically urges the movable case toward a side of the mating connector , wherein the first cam grooves engage with the shutter bosses , such that the shutter is rotated in an opening and closing direction around the shutter bosses in conjunction with the movable case moving, characterized in that the connector further comprises: third cam grooves provided on the both side walls of the outer case , and engaging with the shutter bosses such that the shutter is moved along the connector fitting direction with respect to the outer case in conjunction with the movable case moving; movable case bosses projecting to inner surfaces of the side walls of the movable case; and second cam grooves that are formed on the shutter side walls of the shutter and engage with the movable case bosses to support a rotation of the shutter that moves along the connector fitting direction. a housing that houses a connection terminal ; an outer case that houses and holds the housing ; a movable case that includes first cam grooves formed penetratingly in side walls of the movable case corresponding to each of both side walls of the outer case , and that is movably disposed inside the outer case in a connector fitting direction; a shutter including a shutter front wall that covers a front opening of the housing to which a mating connector is fitted, shutter side walls provided at both end portions of the shutter front wall , and shutter bosses projecting to outer surfaces of the shutter side walls and engaging with the first cam grooves ; and a spring that elastically urges the movable case toward a side of the mating connector , wherein the first cam grooves engage with the shutter bosses , such that the shutter is rotated in an opening and closing direction around the shutter bosses in conjunction with the movable case moving, characterized in that the connector further comprises: third cam grooves provided on the both side walls of the outer case , and engaging with the shutter bosses such that the shutter is moved along the connector fitting direction with respect to the outer case in conjunction with the movable case moving; movable case bosses projecting to inner surfaces of the side walls of the movable case; and second cam grooves that are formed on the shutter side walls of the shutter and engage with the movable case bosses to support a rotation of the shutter that moves along the connector fitting direction. third cam grooves provided on the both side walls of the outer case , and engaging with the shutter bosses such that the shutter is moved along the connector fitting direction with respect to the outer case in conjunction with the movable case moving; movable case bosses projecting to inner surfaces of the side walls of the movable case; and second cam grooves that are formed on the shutter side walls of the shutter and engage with the movable case bosses to support a rotation of the shutter that moves along the connector fitting direction. <EOS>