A method of manufacturing a motor that includes: a motor shaft; a rotor that rotates about the motor shaft; a stator disposed around the rotor, the stator including a stator core and a stator coil wound around the stator core, the stator coil being wound around the stator core in a condition where coil ends (29a, 29b) on respective sides of the stator coil, which serve as turned back parts on respective ends thereof, project outwardly in an axial direction beyond respective axial direction end surfaces of the stator core; a casing accommodating the rotor and the stator; and a sealing body charged into the casing to seal an entirety of the stator or a part of the stator including the coil ends (29a, 29b) on the respective sides, the method comprising: a coil winding step of winding the stator coil around the stator core; an inclination provision step of providing a side surface on a radially inner side of the specific coil end of the coil ends (29a, 29b) on the respective sides of the stator coil, following the coil winding step, with such an inclination that the side surface displaces outwardly in a radial direction with close to a tip of a specific coil end; and an injection step of injecting a sealant which serves as a material of the sealing body, from a side of the specific coil end, into the casing in which the stator whose side surface on the radially inner side of the specific coil end has been provided with the inclination is accommodated, characterized in that the inclination provision step includes providing only the side surface on the radially inner side of the specific coil end with the inclination while keeping a side surface on a radially outer side of the specific coil end parallel to a motor axis direction with no inclination, wherein the inclination provision step includes using an inclination provision jig including an oblique outer peripheral surface inclined so as to decrease in diameter with close to a tip of the inclination provision jig to press the oblique outer peripheral surface against an inner part of the specific coil end while the side surface of the specific coil end is constrained at a radially outer side of the stator by a restricting jig pressed against the side surface. a coil winding step of winding the stator coil around the stator core; an inclination provision step of providing a side surface on a radially inner side of the specific coil end of the coil ends (29a, 29b) on the respective sides of the stator coil, following the coil winding step, with such an inclination that the side surface displaces outwardly in a radial direction with close to a tip of a specific coil end; and an injection step of injecting a sealant which serves as a material of the sealing body, from a side of the specific coil end, into the casing in which the stator whose side surface on the radially inner side of the specific coil end has been provided with the inclination is accommodated, the inclination provision step includes providing only the side surface on the radially inner side of the specific coil end with the inclination while keeping a side surface on a radially outer side of the specific coil end parallel to a motor axis direction with no inclination, wherein the inclination provision step includes using an inclination provision jig including an oblique outer peripheral surface inclined so as to decrease in diameter with close to a tip of the inclination provision jig to press the oblique outer peripheral surface against an inner part of the specific coil end while the side surface of the specific coil end is constrained at a radially outer side of the stator by a restricting jig pressed against the side surface.