A connector configured to be connected to a power supply and mated with an apparatus-side connector configured to be connected to an electrical apparatus, the connector comprising: a plurality of power feeding terminals (21, 22) each corresponding to one of a plurality of power receiving terminals (11, 12) of the apparatus-side connector for receiving a supply of electric power; a switch member configured to be moved between a connecting position for electrically connecting the power feeding terminals (21, 22) and the power supply and a breaking position for breaking a connection of the power feeding terminals (21, 22) and the power supply; and a controlling mechanism configured to prevent a movement of the switch member from the breaking position to the connecting position when the apparatus-side connector is not mating with the connector, the controlling mechanism including: a movable member configured to be linearly movable between a first position in which a movement of the switch member is prevented and a second position in which the switch member is movable, and to be urged toward the first position, characterized by the movable member being configured to enter a path of movement of the switch member at the first position, and a button projecting from the movable member, the button retractably projecting into a recess provided in a housing of the connector to which the apparatus-side connector is to be fit when the apparatus-side connector is not mating with the connector and the movable member is in the first position. a plurality of power feeding terminals (21, 22) each corresponding to one of a plurality of power receiving terminals (11, 12) of the apparatus-side connector for receiving a supply of electric power; a switch member configured to be moved between a connecting position for electrically connecting the power feeding terminals (21, 22) and the power supply and a breaking position for breaking a connection of the power feeding terminals (21, 22) and the power supply; and a controlling mechanism configured to prevent a movement of the switch member from the breaking position to the connecting position when the apparatus-side connector is not mating with the connector, the controlling mechanism including: a movable member configured to be linearly movable between a first position in which a movement of the switch member is prevented and a second position in which the switch member is movable, and to be urged toward the first position, characterized by the movable member being configured to enter a path of movement of the switch member at the first position, and a button projecting from the movable member, the button retractably projecting into a recess provided in a housing of the connector to which the apparatus-side connector is to be fit when the apparatus-side connector is not mating with the connector and the movable member is in the first position. a movable member configured to be linearly movable between a first position in which a movement of the switch member is prevented and a second position in which the switch member is movable, and to be urged toward the first position, characterized by the movable member being configured to enter a path of movement of the switch member at the first position, and a button projecting from the movable member, the button retractably projecting into a recess provided in a housing of the connector to which the apparatus-side connector is to be fit when the apparatus-side connector is not mating with the connector and the movable member is in the first position.