A connector comprising: a housing configured to accommodate a connection terminal ; and a shutter that is rotatably provided in the housing and is configured to open and close a front opening of the housing to which a fitting tip end portion of a mating connector is to be fitted; characterized in that the connector further comprises: a rotation arm that is disposed on one side portion side of the front opening and is rotatably supported to the housing about a rotation axis (X) intersecting a connector fitting direction of the mating connector , the rotation arm including an arm portion that extends toward a front side of the housing relative to the rotation axis (X), and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis (X); and a connection member that is provided so as to be rotatable together with the shutter and includes a first lever portion that is pressed and rotated by a tip end of the connection engagement portion , wherein a pressing force of the mating connector , whose fitting tip end portion is moved to a position facing the front opening, acts on the arm portion so as to rotate the rotation arm , and thus the shutter is rotated together with the connection member rotated by the connection engagement portion so as to open the front opening. a housing configured to accommodate a connection terminal ; and a shutter that is rotatably provided in the housing and is configured to open and close a front opening of the housing to which a fitting tip end portion of a mating connector is to be fitted; characterized in that the connector further comprises: a rotation arm that is disposed on one side portion side of the front opening and is rotatably supported to the housing about a rotation axis (X) intersecting a connector fitting direction of the mating connector , the rotation arm including an arm portion that extends toward a front side of the housing relative to the rotation axis (X), and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis (X); and a connection member that is provided so as to be rotatable together with the shutter and includes a first lever portion that is pressed and rotated by a tip end of the connection engagement portion , wherein a pressing force of the mating connector , whose fitting tip end portion is moved to a position facing the front opening, acts on the arm portion so as to rotate the rotation arm , and thus the shutter is rotated together with the connection member rotated by the connection engagement portion so as to open the front opening. a rotation arm that is disposed on one side portion side of the front opening and is rotatably supported to the housing about a rotation axis (X) intersecting a connector fitting direction of the mating connector , the rotation arm including an arm portion that extends toward a front side of the housing relative to the rotation axis (X), and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis (X); and a connection member that is provided so as to be rotatable together with the shutter and includes a first lever portion that is pressed and rotated by a tip end of the connection engagement portion , wherein a pressing force of the mating connector , whose fitting tip end portion is moved to a position facing the front opening, acts on the arm portion so as to rotate the rotation arm , and thus the shutter is rotated together with the connection member rotated by the connection engagement portion so as to open the front opening. <EOS>