A switchgear including: a housing; a switching device compartment disposed in the housing; a switching device disposed in the switching device compartment as carried on a carriage; and a door which is configured to be opened and closed when the switching device is loaded in or unloaded from the switching device compartment, the switchgear comprising: a stopper fitting and a stopper operation fitting mounted to an inside wall of the switching device compartment; a rotatable stopper operation lever, one end of which is connected to the stopper fitting and the other end of which is connected to the stopper operation fitting; a handlebar configured for operating a loading and unloading mechanism of the switching device for moving the switching device between an operation and a disconnection position, characterized in further comprising: a stopper pin mounted to the switching device; a door fixing bracket projected from an inner side of the door; a cylindrical member fixed on one side to a handlebar insertion port cover at an insertion port which is formed in the door and in which the handlebar is configured to be inserted; a switching device loading/unloading mechanism to be engaged with the handlebar inserted in the cylindrical member; and a handlebar insertion port cover which closes an insertion port of the cylindrical member when the handlebar is not inserted in the cylindrical member; an engagement lever rotatably mounted to the inside wall of the switching device compartment via a fixing pin (10a-c); and an engagement pin mounted to the inner side of the door and engageable with the engagement lever, wherein: when the switching device is accommodated in the switching device compartment, the engagement lever is rotated about the fixing pin (10a-c) and retained in a horizontal position by the stopper pin while the engagement lever and the engagement pin do not interfere with each other; when the switching device is moved to a rear side of the switching device compartment by manipulating the handlebar, the engagement lever is rotated in accordance with the position of the stopper pin, bringing a groove formed at an end of the engagement lever into engagement with the engagement pin; when the door is in an open state and the switching device is located at a disconnection position, the switching device is stopped at the disconnection position due to interference between the stopper fitting and the stopper pin; when the door is closed and the switching device is moved from the disconnection position to an operation position, the door fixing bracket rotates the stopper operation lever by pushing in the stopper operation fitting so that the stopper fitting is lifted up to permit the movement of the switching device between the disconnection and the operation position; and the insertion of the handlebar in the cylindrical member is permitted by opening the handlebar insertion port cover and the cylindrical member is engaged with the switching device loading/unloading mechanism so that if the insertion port cover is open, the front door cannot be opened. when the switching device is accommodated in the switching device compartment, the engagement lever is rotated about the fixing pin (10a-c) and retained in a horizontal position by the stopper pin while the engagement lever and the engagement pin do not interfere with each other; when the switching device is moved to a rear side of the switching device compartment by manipulating the handlebar, the engagement lever is rotated in accordance with the position of the stopper pin, bringing a groove formed at an end of the engagement lever into engagement with the engagement pin; when the door is in an open state and the switching device is located at a disconnection position, the switching device is stopped at the disconnection position due to interference between the stopper fitting and the stopper pin; when the door is closed and the switching device is moved from the disconnection position to an operation position, the door fixing bracket rotates the stopper operation lever by pushing in the stopper operation fitting so that the stopper fitting is lifted up to permit the movement of the switching device between the disconnection and the operation position; and the insertion of the handlebar in the cylindrical member is permitted by opening the handlebar insertion port cover and the cylindrical member is engaged with the switching device loading/unloading mechanism so that if the insertion port cover is open, the front door cannot be opened.