An elevator door control device includes: a car door panel and a hall door panel that open/close, respectively; a motor that drives the car door panel to open/close; jointing means for mechanically jointing the car door panel and the hall door panel to each other so that the panels open/close in an integrated manner; a closer device that provides a self-closing force in a door close direction to the hall door panel, and controller controlling the motor. The controller includes a torque detection unit that detects a torque of the motor in at least one of door closing and door opening of the panels when the panels are jointed to each other, and a diagnosis unit determines whether or not the hall door panel can self-close via the self-closing force when the panels are not jointed to each other, based on the torque detected by the torque detection unit.