A socket wrench in which a supporting hole is formed in a drive disposed at an operating handle, and a steel ball pressed by a coiled spring is movably engaged with the supporting hole. A recess part for allowing the steel ball to partly engage therein is formed in an inner wall of an assembling hole of a wrench body for allowing the drive to engage therein. A connecting hole engageable with a polygonal head part of a bolt to be operated is formed in the wrench body in such a manner as to be coaxial with the drive. The recess part has a pair of contacting walls for the steel ball to contact therewith, the pair of contacting walls being disposed in mutually intersecting directions.