In a stator mounting method in which a coil unit is inserted into a stator core and a lead wire protruding from the coil unit is inserted into and mounted on a terminal portion of the stator core, the lead wire is passed through a lead wire pullout portion located at a predetermined position of a coil frame body, a height from an inner peripheral upper face of the coil frame body to the lead wire pullout portion is equalized with a distance from a core upper face of the stator core to a lead wire insertion position inner peripheral lower face of the terminal portion, and the core upper face of the stator core is held in contact with an inner peripheral upper face of the coil frame body after the lead wire is inserted into the terminal portion.