A method for recognizing a reference position of a wedge member of a disk brake for vehicles, which has a disk rotating together with the rotation of a wheel of a vehicle, a movable friction pad rubbing against one surface of the disk and generating braking force, the wedge member having one surface, to which the movable friction pad is attached, and moving in a rotating direction of the disk and moving forward to the disk by a driving motor for generating driving force, a guide member guiding the wedge member to the disk when the wedge member moves in the rotating direction of the disk, and a driving force transfer member screw-connected to a rotary shaft of the driving motor, moving in the rotating direction of the disk by the driving motor, and causing the wedge member to move in the rotating direction of the disk, the method including moving the wedge member to a left end of an operating section and recognizing a position of the left end, when a driver applies a pressure to a pedal; moving the wedge member to a right end of the operating section and recognizing a position of the right end, when the position of the left end is recognized; determining a middle position between the left end and the right end to be a central point of the entire moving distance; and recognizing the middle position as a reference position for controlling braking of the wedge member.