An automatic supplying device of door hinges includes: a door hinge supplying device having the door hinges loaded in upward and downward directions and supplying the door hinges; and a transferring device provided on a rear surface of the door hinge supplying device and automatically transferring the door hinges. The door hinge is automatically supplied when it is mounted, which makes it possible to improve work efficiency. In addition, a cylinder driving scheme is used, which makes it possible to decrease generation of noise at the time of supplying the door hinge, and a configuration for loading and moving the door hinge is simplified, such that a work space may be secured, and improving work convenience.