Abstract: A pulse motor comprises A-and C-phase coils wound on a common core with opposite polarities appearing on the core, B- and D-phase coils wound on a common core with opposite polarities appearing on the core, first, second, third and fourth switching transistors connected in series with A-, B-, and C-and D-phase coils, respectively, and a control signal for controlling respective conduction states of the first, second, third and fourth switching transistors to permit a sequential excitation of the A-and B-phase coils, B-and C-phase coils, C-and D-phase coils, and D-and A-phase coils in this order. After a predetermined time following a start of the turning-OFF of one of said first, second, third and fourth switching transistors another one of the first, second, third and fourth transistors is turned ON.