After a Hall IC sensor is set in a connector in such a manner that the Hall IC sensor and a harness are electrically connected to each other, the connector and the Hall IC sensor are inserted from an opposite side of a connector insertion hole in a radial direction toward one side of the connection insertion hole in the radial direction, and a first magnetism collection ring and a second magnetism collection ring are inserted into a torque sensor container portion from a first opening portion in such a manner that the Hall IC sensor is situated between the first magnetism collection ring and the second magnetism collection ring in the radial direction.