A torque sensor that detects torque acting on a torsion bar that connects a first shaft and a second shaft, which are rotatably supported in a housing (30, 49), comprising: a magnetism generation portion that rotates together with the first shaft; a rotating magnetic circuit portion that rotates together with the second shaft; a fixed magnetic circuit portion fixed to the housing (30, 49); a magnetism detector that detects a magnetic flux density guided from the magnetism generation portion to the fixed magnetic circuit portion through the rotating magnetic circuit portion in accordance with torsional deformation of the torsion bar; and a shield configured to shield the magnetism detector magnetically from a flux leakage generated in the rotating magnetic circuit portion by being disposed between the rotating magnetic circuit portion and the magnetism detector, the rotating magnetic circuit portion comprises a first soft magnetic ring and a second soft magnetic ring to which magnetic flux generated by the magnetism generation portion is guided in accordance with the torsional deformation of the torsion bar, the fixed magnetic circuit portion comprises: a first magnetic flux collecting ring and a second magnetic flux collecting ring provided along respective outer peripheries of the first soft magnetic ring and the second soft magnetic ring; and a first magnetic flux collecting yoke and a second magnetic flux collecting yoke connected respectively to the first magnetic flux collecting ring and the second magnetic flux collecting ring and disposed so as to face each other via a magnetic gap in which the magnetism detector is disposed, and the shield (50, 60) is disposed to guide the flux leakage generated in the rotating magnetic circuit portion between the first magnetic flux collecting yoke and the second magnetic flux collecting yoke, and the shield is disposed between the first magnetic flux collecting yoke and the second magnetic flux collecting yoke via respective predetermined gaps, and characterized in that the shield is arranged outside the first soft magnetic ring and the second soft magnetic ring in the radial direction. a magnetism generation portion that rotates together with the first shaft; a rotating magnetic circuit portion that rotates together with the second shaft; a fixed magnetic circuit portion fixed to the housing (30, 49); a magnetism detector that detects a magnetic flux density guided from the magnetism generation portion to the fixed magnetic circuit portion through the rotating magnetic circuit portion in accordance with torsional deformation of the torsion bar; and a shield configured to shield the magnetism detector magnetically from a flux leakage generated in the rotating magnetic circuit portion by being disposed between the rotating magnetic circuit portion and the magnetism detector, the rotating magnetic circuit portion comprises a first soft magnetic ring and a second soft magnetic ring to which magnetic flux generated by the magnetism generation portion is guided in accordance with the torsional deformation of the torsion bar, the fixed magnetic circuit portion comprises: a first magnetic flux collecting ring and a second magnetic flux collecting ring provided along respective outer peripheries of the first soft magnetic ring and the second soft magnetic ring; and a first magnetic flux collecting yoke and a second magnetic flux collecting yoke connected respectively to the first magnetic flux collecting ring and the second magnetic flux collecting ring and disposed so as to face each other via a magnetic gap in which the magnetism detector is disposed, and the shield (50, 60) is disposed to guide the flux leakage generated in the rotating magnetic circuit portion between the first magnetic flux collecting yoke and the second magnetic flux collecting yoke, a first magnetic flux collecting ring and a second magnetic flux collecting ring provided along respective outer peripheries of the first soft magnetic ring and the second soft magnetic ring; and a first magnetic flux collecting yoke and a second magnetic flux collecting yoke connected respectively to the first magnetic flux collecting ring and the second magnetic flux collecting ring and disposed so as to face each other via a magnetic gap in which the magnetism detector is disposed, and the shield (50, 60) is disposed to guide the flux leakage generated in the rotating magnetic circuit portion between the first magnetic flux collecting yoke and the second magnetic flux collecting yoke, and the shield is disposed between the first magnetic flux collecting yoke and the second magnetic flux collecting yoke via respective predetermined gaps, and characterized in that the shield is arranged outside the first soft magnetic ring and the second soft magnetic ring in the radial direction.