PURPOSE: To surely open a door to a perfect opening position by correcting the standard value at the opened edge part of the speed standard in the direction for increasing the door opening force, when the perfect opening of the door is not detected, even if the time measured from the start of the door opening exceeds a standard value for judging the opening anomaly of the door.
CONSTITUTION: An opening signal detecting means 21 detects the start of the door opening on the basis of the output signal of an elevator control panel 1. A time measuring means 22 is connected with the door opening signal detecting means 21, and the lapse time from the start of the door opening is measured. Even if the measured time exceeds a standard value for judging the anomaly in door opening, if a door position detecting means 23 does not detect the perfect opening of the door, the standard value at the opening edge part of the speed standard is corrected in the direction for increasing the opening force of the door. Accordingly, even if the traveling resistance of the door increases slightly, the door can be opened surely to the perfect opening position.