Absolute encoder

An absolute encoder comprising:

• a support shaft having one end fixed to a substrate, and including a flange part at an other end, the support shaft being formed of a magnetic material;
• at least one bearing including an inner ring fixed to the support shaft;
• a magnetized magnet;
• a spacer disposed between the bearing and the magnet in an axial direction of the support shaft;
• a magnet holder configured to hold the magnet;
• a washer disposed between the substrate and the bearing in the axial direction;
• and
• a magnetic sensor configured to detect a magnetic flux from the magnet, wherein the magnet holder includes:
• a bearing fixing part being a recess part exposed at one side in the axial direction, and fixed to an outer ring of the bearing, and
• a magnet holding part being a recess part formed at an other end side of the bearing fixing part,
• the bearing is disposed between the substrate and the flange part in the axial direction,
• the spacer is in contact with the outer ring of the bearing from the axial direction inside the bearing fixing part,
• the substrate includes a hole, the support shaft being insertable into the hole and a nut disposed in the hole, and
• the support shaft includes a male screw part at the one end, and
• the support shaft is fixed to the substrate together with the bearing by screwing the male screw part into the hole and the nut.