A golf club aiming sight device having a clamp portion and a rear sight portion. The rear sight portion has one or more openings to visualize a front sight on a club head of a golf club. The clamp portion provides for the attachment of the golf club aiming sight device to the shaft of the golf club so that the front sight is visually alignable with the opening in the rear sight. The front sight has a triangular shape and the rear sight has a triangular or V shape, thereby allowing rapid and accurate visual alignment of the front and rear sights, even while swinging the golf club. The golf club aiming sight device is used to train a user to swing the golf club without bending or rotating the wrists by having the user maintain the front sight visually aligned with the opening in the rear sight while swinging the golf club.