PURPOSE: To obtain the strong joint of strings with good appearance by providing a nozzle tangentially opening to a string ending hole and a nozzle opening toward the center of the string ending hole.

CONSTITUTION: A string ending member 1 is provided with a cylindrical string ending hole 2, a nozzle 5 tangentially opening to a slit 3 and the string ending hole 2 and a nozzle 4 opening toward the center of the string ending hole 2. When the nozzles 4, 5 start to inject, a time lag is caused. And, when designating a period where only the nozzle 4 is firstly actuated as an A period, and a period where both nozzles 4, 5 are actuated as a B period, agitation between fibers is promoted by the jet flow from the nozzle 4 aiming at the central part of the string ending hole 2 to strengthen the joint of strings in the A period, while in the B period, the nozzle 5 oriented in the tangential direction is operated besides the nozzle 4 aiming at the central part, enabling a good appearance joint without corner parts to be produced due to a spinning flow.