Embodiments relate to a stator unit, a stator, and a motor comprising same, the stator unit comprising: a unit stator core; an insulator disposed on the unit stator core; and a coil wound on the insulator, wherein the unit stator core comprises a main body formed so as to have a prescribed curvature with reference to the centre, and three teeth formed so as to protrude toward the centre from the main body, the main body comprising notches formed between the teeth. Thus mass productivity can be increased as a result of series winding using a coil on a unit stator core having three teeth arranged thereon.