PURPOSE: To make the motion types of intermittent rotary motion easily changeable, with one turn of rotary amount of intermittently rotating output shaft made steplessly changed, by shifting a moving unit of the interlocking device.

CONSTITUTION: In accordance with the rotation of a solid cam 1, linked to the motor, is swingably rotated a turret 2. An interlocking device 5, that works to link a turret shaft 3, unified with this turret 2, to an output shaft 4, is provided with a first swing unit 8, engaged to the turret shaft 3, at one end and a shift unit 10, installed to within this swing unit 8 and made shiftable in the direction of an axial line 9 of the first swing unit 8. With this shift unit 10 operably linked to an adjusting device 13 and a shifting amount of the shift unit 10 in the direction of axial line of the first swing unit 8 adjusted, the swing angle of a second swing unit 11, engaged to the output shaft 4 at one end and linked to the shift unit 10 at another end, is varied with respect to a swing angle of the first swing unit 8, thus a rotating amount of the output shaft 4 is steplessly changed.