[Problem] To provide a torque screwdriver capable of making a mark by bringing a marker into direct contact with a surface of a fastener component such as a screw. [Solution] The torque screwdriver (1) in which the tightening force on a case (10) is transmitted to a main shaft (20) via a torque limiter part (30) and in which the case (10) rotates with respect to the main shaft (20) when an tightening torque on the screw (80) which is engaged with a bit (70) mounted on a coupler (60) that is fixed to the tip of the main shaft (20), reaches a torque value established for the torque limiter part (30). The torque screwdriver comprises: the marker (54) that passes from inside the coupler (60) through the side surface of the bit (70) to reach the tip of the bit (70); and a marker-operating part (40) that causes the tip (53) of the marker to contact and mark the screw (80) by moving the marker (54) forward using the rotation of the case (10) with respect to the main shaft (20).