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 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, and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis; 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 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, and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis; 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 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, and a connection engagement portion that extends toward another side portion side of the front opening relative to the rotation axis; 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.