The invention provides an injection molding machine capable of improving motor performance. In the injection molding machine having a motor, the abovementioned motor has an iron core, an insulator fixed on an end face of the iron core, a coil wound on the abovementioned iron core and the abovementioned insulator, an insulating strip which insulates the abovementioned iron core form the abovementioned coil, and an alignment component which aligns the abovementioned iron core with the abovementioned insulator. At least one of the abovementioned iron core and the abovementioned insulator has an insertion part for insertion of the abovementioned alignment component, the abovementioned alignment component and a part of the abovementioned insulating strip are inserted into the abovementioned insertion part together, thus alignment of the abovementioned iron core and the abovementioned insulator is performed, and at least one of the abovementioned iron core and the abovementioned insulator and the abovementioned alignment component clamp the abovementioned insulating strip and thereby realizing fixing.