To prevent generation of cogging and obtain expected performance, in a motor which is used in a motor-operated reel.

This motor 4 of a motor-operated reel is installed in a reel main body 1 and drives and rotates a spool 3 for a cotton reel in the reeling direction, and equipped with a hollow case 30, a rotating shaft 32, an armature 33 and a field system 31. The rotating shaft 32 is rotatably installed in the case 30. The armature 33 is fixed to the rotating shaft 32. The field system 31 is fixed to the inner peripheral surface of the case 30 on the outer peripheral side of the armature 32, and magnetized in the direction which is oblique to an axial line O of the rotating shaft 32 and does not intersect the shaft.