An angle wrench that is used for tightening an object to be tightened by a rotation angle method, comprising: a handle having a grip; a head section having a tightening head configured to tighten the object to be tightened and a tail section that extends from the tightening head being pivotally supported with respect to the handle via a head pin; a torque-detecting mechanism configured to detect when a torque for tightening the object to be tightened has reached a specified torque, the torque-detecting mechanism having a toggle mechanism configured to couple the tail section of the head section to the handle and changes from a first coupling state to a second coupling state when a tightening torque for the object being tightened has reached the specified torque; and a rotation angle-measuring section configured to measure a rotation angle of the angle wrench in a tightening action, on the basis of an angular velocity of the angle wrench around an axis of the object being tightened, after a timing at which the torque-detecting mechanism detects that the specified torque has been reached, the angle wrench further comprises a case that is disposed on the handle, accommodates an electronic circuit (22, 30), and is provided on an outer surface thereof with a display unit configured to display the tightening angle of the object being tightened, characterized in that the torque-detecting mechanism includes: an interlock pin that extends from the head section into the case through holes formed respectively in the handle and the case, the interlock pin being displaced following actuation of the toggle mechanism; and a detection sensor configured to detect the movement of the interlock pin due to the actuation of the toggle mechanism, and the rotation angle-measuring section measures the rotation angle of the angle wrench during the tightening action after a timing at which the detection sensor has detected the action of the interlock pin. a handle having a grip; a head section having a tightening head configured to tighten the object to be tightened and a tail section that extends from the tightening head being pivotally supported with respect to the handle via a head pin; a torque-detecting mechanism configured to detect when a torque for tightening the object to be tightened has reached a specified torque, the torque-detecting mechanism having a toggle mechanism configured to couple the tail section of the head section to the handle and changes from a first coupling state to a second coupling state when a tightening torque for the object being tightened has reached the specified torque; and a rotation angle-measuring section configured to measure a rotation angle of the angle wrench in a tightening action, on the basis of an angular velocity of the angle wrench around an axis of the object being tightened, after a timing at which the torque-detecting mechanism detects that the specified torque has been reached, the angle wrench further comprises a case that is disposed on the handle, accommodates an electronic circuit (22, 30), and is provided on an outer surface thereof with a display unit configured to display the tightening angle of the object being tightened, characterized in that the torque-detecting mechanism includes: an interlock pin that extends from the head section into the case through holes formed respectively in the handle and the case, the interlock pin being displaced following actuation of the toggle mechanism; and a detection sensor configured to detect the movement of the interlock pin due to the actuation of the toggle mechanism, and an interlock pin that extends from the head section into the case through holes formed respectively in the handle and the case, the interlock pin being displaced following actuation of the toggle mechanism; and a detection sensor configured to detect the movement of the interlock pin due to the actuation of the toggle mechanism, and the rotation angle-measuring section measures the rotation angle of the angle wrench during the tightening action after a timing at which the detection sensor has detected the action of the interlock pin.