Stator and motor

Provided is a technique for achieving a compact motor size in the axial direction. This stator comprises: a plurality of coil groups aligned in an annular shape; and a substrate provided on one side of the coil groups along the axis and having a plurality of wiring layers. The coil groups are provided with a first coil group, a second coil group, and a third coil group in this order in a round direction. The energization direction of the first coil group is different from those of the second coil group and the third coil group. In the first coil group, the first end portions of a second coil and the first end portions of a third coil are electrically connected to each other by a wiring layer, and the second end portions of a first coil and the second end portions of the second coil are electrically connected to each other by a wiring layer.