To obtain an excellent twisted wire free from irregularity in a twisting pitch by using an electric motor of an ordinary revolution speed as the motor for turning an orbital revolution body of a differential device.

A single twist type twisting machine is equipped with a main motor 3 to turn a flyer 1 and a winding bobbin 2, with a first differential device 4 to give a difference between the numbers of revolution of the flyer 1 and the bobbin 2 and different from the above, with a second differential device 5. For driving the second differential device 5, a first motor 7 to turn an input center shaft and a second motor 9 to turn an orbital revolution body 8 are arranged and revolution power for an output center shaft 10 of the second differential device 5 is transmitted to an orbital revolution body 11 of the first differential device 4 through a power transmission mechanism 12.