PURPOSE: To constitute a door locking arrangement symmetrically by providing a link means, actuating a latch operation member when the combination of an arrangement lock is correct, and actuating an arrangement lock reset member when it is incorrect.

CONSTITUTION: When a correct combination is set in a push button 31 of an arrangement lock chamber 29, a control shaft 37 is connected to a latch operation member 57 by a link means 43. Then, an actuating member 55 actuates a latch operation member 57 to retract the latch member so that a door is unlocked. When setting an incorrect combination, the control shaft 37 is connected to an arrangement lock reset member 49 by the link means 43. In this case, the actuating member 55 actuates the arrangement lock reset member 49 to reset the arrangement lock. By this constitution, the device is symmetrically formed and eliminate useless deformation applied to the door can be eliminated.