To enhance stability for holding thread and simplify a structure by applying the constitution that a thread passing body with a thread passing piece at one end is secured to a thread passing appliance, and the thread passing appliance is internally provided with such a slide body as formed to be freely slidable only toward the end of the thread passing body and formed to have a needle holding recess and a thread holding groove at one end.

A thread end is placed in thread holding grooves 33 and 34 formed on the end of a slide body 21, and laterally led to to the projected passage of a thread passing piece laid on the end of a thread passing body 41. Also, upper and lower marks 53 and 54 are vertically aligned, and a needle contact recess 37 on the end of the slide body 21 is kept in contact with a needle near a needle eye, and then a needle passing body 12 is pressed to the needle, while the slide body 21 being slightly dislocated along a vertical direction. The slide body 21 is thereby forced into a hollow part 13. As a result, the thread passing piece on the end of the thread body 41 projects and forces the thread into the needle eye. Thereafter, a pressing force for the thread passing body 12 is gradually reduced. Consequently, the thread passing piece retreats and the thread remains in the needle eye. Then, a thread passing appliance 11 is separated from the needle. In addition, the needle is picked up between fingertips and pulled out beyond the needle.