The present design relates to a monkey wrench. The subject innovation is, having a handle and, with a wrench head located at the front of the handle, the floating jaw connected to the wrench head and a guide groove formed on the inner surface of the wrench head and the rack is inserted into the guide groove formed at a predetermined length in the monkey wrench consisting of a pinion which is chukseol the first receiving groove has an axis and moving jaw arranged to face the floating jaw, formed on the spanner head move said rack in said guide groove, said pinion shaft one end provided with a first bevel and a gear is further formed; Second receiving recess with the first receiving recess and a distance is formed in the handle and; Once in the two bevel gears is formed to have an axis chukseol to the second receiving groove and the rotating roll; A long hole formed to extend through connecting the first receiving recess and the second receiving recess in the handle and; A is inserted into the long hole end portions is exposed to the first receiving groove and a second housing groove with the rotating shaft; Provided at both ends of the rotating shaft by a third bevel gear and fourth bevel gear and the third bevel gear is meshed with the first bevel gear, said fourth bevel gear is meshed with the second bevel gears, the rotating roll when rotation is characterized in that one so as to move the movable jaw which the pinion is driven. As a result, a separate pinion provided on after by a pinion provided on an existing Monkey wrenches to move the moving jaw to rotate from a distance into only the various types of bolts, and head portions of the monkey wrench to the vicinity of a nut portion thereof is covered by a variety of apparatus or machine appliance handle by moving the mobile jaw rotation has the effect of reducing the ease of working time job with benefits that can be screwed in place, loosen the bolts and nuts that can not get a hand holding a monkey wrench easily from a distance.