PURPOSE: To carry out taking-up for convenience of the main usage of a bound spun yarn by introducing two single yarns which are spun in a pair of spinning parts of a two-ply binding spinning machine to a taking-up device without binding both the yarns and taking up the yarns as a pair of cheese to a taking-up bobbin held by a single cradle.

CONSTITUTION: Two binding yarns Y1 and Y2 which are spun out from spinning units 1a and 1b are taken out as they are to a delivery roller 4 and sent into a taking-up device 7. The yarn Y1 is traversed by a traverse guide 8a, and the yarn Y2 is traversed by a traverse guide 8b, and each traverse range of both the traverse guides 8a and 8b is set so as not to be superposed, and both the yarns Y1 and Y2 are taken up to the different positions on a single bobbin 9, and the packages P1 and P2 are formed, and a pair of cheeses P are formed. The cheese P is used as it is for the supplied thread in the upper and lower stages of a double twister, while if the bound yarn is used as the weft of the no-defraying fiber, the winding starting part of the yarn of one package is joined with the winding edge of the yarn of the other package.