An elevator control device comprising: a group control cabinet for controlling a plurality of elevators provided in a building as one group; a security gate provided on a passage leading to a hall of the one group of elevators; and a person authentication device provided at the security gate; and wherein when a verified person is authenticated as a registered person by the person authentication device, the security gate is opened to allow the verified person to move into the hall, the elevator control device comprising: destination call assignment means provided in the group control cabinet to determine an assigned car for the verified person, who has been authenticated, based on the previously registered destination floor information when the verified person is authenticated as the registered person by the person authentication device; and destination call automatic registration means which automatically registers the destination call based on the destination floor information for the assigned car when it is detected that a user has boarded the assigned car, which is determined by the destination call assignment means, at a predetermined floor; characterized by a hall destination floor registration device provided in the hall so that the user who is present in the hall registers his/her destination floor; and registration control means which validates the destination floor registration of the user made using the hall destination floor registration device based on a predetermined condition; wherein the registration control means always invalidates the destination floor registration of the user made using the hall destination floor registration device, and validates the destination floor registration of the user made using the hall destination floor registration device in at least one case of - the case where the assigned car for the verified person has arrived at the hall before the verified person authenticated as the registered person by the person authentication device arrives at the hall, and - the case where the assigned car is full-load at the hall. a group control cabinet for controlling a plurality of elevators provided in a building as one group; a security gate provided on a passage leading to a hall of the one group of elevators; and a person authentication device provided at the security gate; and wherein when a verified person is authenticated as a registered person by the person authentication device, the security gate is opened to allow the verified person to move into the hall, the elevator control device comprising: destination call assignment means provided in the group control cabinet to determine an assigned car for the verified person, who has been authenticated, based on the previously registered destination floor information when the verified person is authenticated as the registered person by the person authentication device; and destination call automatic registration means which automatically registers the destination call based on the destination floor information for the assigned car when it is detected that a user has boarded the assigned car, which is determined by the destination call assignment means, at a predetermined floor; characterized by a hall destination floor registration device provided in the hall so that the user who is present in the hall registers his/her destination floor; and registration control means which validates the destination floor registration of the user made using the hall destination floor registration device based on a predetermined condition; wherein the registration control means always invalidates the destination floor registration of the user made using the hall destination floor registration device, and validates the destination floor registration of the user made using the hall destination floor registration device in at least one case of - the case where the assigned car for the verified person has arrived at the hall before the verified person authenticated as the registered person by the person authentication device arrives at the hall, and - the case where the assigned car is full-load at the hall. destination call assignment means provided in the group control cabinet to determine an assigned car for the verified person, who has been authenticated, based on the previously registered destination floor information when the verified person is authenticated as the registered person by the person authentication device; and destination call automatic registration means which automatically registers the destination call based on the destination floor information for the assigned car when it is detected that a user has boarded the assigned car, which is determined by the destination call assignment means, at a predetermined floor; characterized by a hall destination floor registration device provided in the hall so that the user who is present in the hall registers his/her destination floor; and registration control means which validates the destination floor registration of the user made using the hall destination floor registration device based on a predetermined condition; - the case where the assigned car for the verified person has arrived at the hall before the verified person authenticated as the registered person by the person authentication device arrives at the hall, and - the case where the assigned car is full-load at the hall.