PURPOSE: To provide a thread ending device in a simple structure, which can avoid a jumping out of the thread end from the ending hole in a thread twisting operation.

CONSTITUTION: A rotatable rotor 12 which has untwisting nozzles 26 and 27 to absorb and untwist the thread end YA of the thread feeding side and the thread end YB at the thread winding side; and a thread ending nozzle 9 provided to the rotor 12, which winds the thread ends YA and YB to the periphery and completes them in a thread ending hole where a rotating air current operates; are provided. Such a constitution is a specific feature of this thread ending device.