The present invention addresses the problem of providing an angle wrench that has a simple structure and is capable of accurately measuring rotation angle. The solution to the problem is an angle wrench used for tightening an object to be tightened by means of the rotation angle method, the angle wrench being provided with: a handle (2) having a grip (2a) ; a head section (4) having a tightening head (4a) for tightening the object to be tightened, and the tail section (4c) that extends from the tightening head (4a) being pivotally supported with respect to the handle (2) via a head pin (2b); torque-detecting mechanisms (6, 18, 20) for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section (24, 102) for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque-detecting mechanism has detected that the specified torque has been reached.