Motor and robot

A motor comprising:

• a stator including a coil;
• a rotor including a shaft and configured to rotate relative to the stator around an axis extending in a predetermined direction;
• a detector configured to detect a rotating position of the rotor;
• a holder disposed between the stator and the detector in the predetermined direction;
• and
• a bearing held by the holder and configured to rotatably support the shaft, wherein
• a recess opened toward the stator and housing the bearing and an injection hole including a first opening opened toward the detector, the injection hole communicating with the recess, are provided in the holder,
• a groove into which an adhesive is injected is provided on an inner surface of the recess, and an outer circumferential surface of the bearing is fixed to the inner surface via the adhesive,
• the injection hole includes a second opening opened in an inner circumferential surface of the recess and connected to the groove, and
• the injection hole is closed by a screw.