(57) In a yarn twisting machine in which a supply yarn package is provided at an upper side of a machine frame, since the supply yarn package is located higher than an average height of a worker, a replacing work is difficult.
In a yarn twisting machine 1 in which a supply yarn package 10 is provided at an upper side of a machine frame 2, a supply yarn bobbin elevating and lowering supporting device 9 is provided for elevating and lowering the supply yarn package 10. The supply yarn bobbin elevating and lowering supporting device 9 includes a spring 36 for urging in an elevating direction, a bobbin supporting frame 28 which supports the supply yarn package 10, and a stopping means 40 for stopping the bobbin supporting frame 28 at a lowered position. By the bobbin supporting frame 28 being held at the lowered position, the stopping means 40 is operated automatically. A gripper 39 is provided on the bobbin supporting frame 28 and a releasing lever 45 is provided on the gripper 39 for releasing the operation of the stopping means 40.