A stator according to an aspect of the present invention includes a stator core having a core back in an annular shape surrounding a central axis of the stator, and a plurality of teeth extending radially inward from the core back. The stator core has a hole provided in a radially outer portion of the stator core, the hole extending in an axial direction, and a weld provided on a radially outer surface of the stator core. The weld includes a first weld provided on the radially outer surface of the stator core on a virtual line connecting the hole and the central axis as viewed in the axial direction.