Focusing method and the focusing device and the hollow fiber bundle of Itotaba-tai the collection fiber bundle while realizing space saving can be reliably cut the yarn bundle cutting body in the longitudinal direction needed to cut the aggregate fiber bundle and to provide a manufacturing method and manufacturing equipment. A plurality of continuous thread Ba set fiber bundle Bb, which was set in the longitudinal while transported in the direction W to continue to sequentially cut into a fiber bundle cutting body Bc, sequentially collected and Itotaba-tai the cut fiber bundle cutting body Bc Itotaba-tai Bd focusing methods and a focusing device 100 for bundling the Bd is a collection fiber bundle Bb which moves in the first direction X1 is held at the first holding position P1, a first holding position P1 is in the second holding position P2 The second is held at the holding position P2 after it is separated from the retaining operative position R1, then was held at the third holding position P3 on the upstream side of the second holding position P2, the second holding position P2 third holding position P3 During it was cut and the third holding position P3 as the first holding position P1, and repeats the series of operations.集合糸束を切断するために必要な長手方向における省スペース化を実現しつつ集合糸束を糸束切断体に確実に切断することができる糸束体の集束方法及び集束装置並びに中空糸束の製造方法及び製造装置を提供する。複数本の連続的な糸Baを集合させた集合糸束Bbを長手方向Wに搬送しながら糸束切断体Bcに順次切断していき、切断した糸束切断体Bcを順次集めて糸束体Bdに束ねる糸束体Bdの集束方法及び集束装置100は、第1保持位置P1で保持されて第1方向X1に移動する集合糸束Bbを、第1保持位置P1が第2保持位置P2の保持動作位置R1に対して離間した後に第2保持位置P2で保持し、第2保持位置P2よりも上流側の第3保持位置P3で保持した後、第2保持位置P2と第3保持位置P3との間を切断し、第3保持位置P3を第1保持位置P1として、これらの一連の動作を繰り返す。
