The present design relates to a monkey wrench. The subject innovation is to have a rack to be inserted into the guide groove and the guide groove formed on the inner surface of the floating jaw and said wrench head is associated with the wrench head and a wrench head located at the front of the handle and the handle is formed at a predetermined length opposite to the floating jaw It has mobile jaw provided with a first axis is chukseol the receiving groove in the monkey wrench consisting of a pinion for moving the rack in the guide groove of the pinion shaft end is formed on the wrench head, and a rotating roll further formed on the handle of the spanner It connects first to a rotating roll and a belt chukseol the second receiving groove is formed by rotating the rotating roll by the belt rotates, and the rotating roll is rotated chukseol the racks of the first receiving groove to the pinion is rotated eventually to move the moving jaw to be a so characterized. The rotation from a distance the pinion provided on the wrench by the by the effect of shortening the working time of the working convenience and with the advantage that can be screwed sikimeuroseo loosen the bolts and nuts to move the jaws move easily from a distance.