A yarn pooling roller (51) includes a yarn pooling section (52), a first tapering section (58) that widens from a base end section (52a) of the yarn pooling section (52) towards the yarn supplying device side by a first inclination angle (θ1), and a second tapering section (59) that widens from the first tapering section (58) towards the yarn supplying device side by a second inclination angle (θ2) that is smaller than the first inclination angle (θ1). The second tapering section (59) receives the guided spun yarn (Y) and prevents an end of the spun yarn Y from moving towards the tip end section (52b) side of the yarn pooling section (52) at a breakage of the spun yarn Y. The first tapering section (58) guides the spun yarn (Y) received by the second tapering section (59) to the base end section (52a).