To provides a lead screw type stepping motor which is excellent in a response and controllability and can carry out an accurate initial alignment, a rotor (2) is rotatably supported inside of a stator (1) around which an exciting coil (1A) is wound, a female threaded hole (2A) is provided in the center of the rotor (2), a slider (6) is arranged to be engaged with the female threaded hole (2A), a slit groove (6C) shaped in an oblong hole is pierced through in the slider (6), which is movably arranged in a guide hole (3B) of a case (3), a guide pin (7) is arranged to be inserted into the slit groove (6C), and both ends of the guide pin (7) are press inserted and fixed to a bearing portion (3A) in which the guide hole (3B) is provided.