A spinning unit comprising: a yarn pooling device; a yarn supplying device (6, 7) adapted to supply spun yarn that is guided to the yarn pooling device; and a winding device adapted to wind the spun yarn guided from the yarn pooling device to form a package, wherein the yarn pooling device is arranged between the yarn supplying device (6, 7) and the winding device, and is adapted to pool the spun yarn, the yarn pooling device comprising: a yarn pooling roller around which the spun yarn is wound, the yarn pooling roller including a yarn pooling section around which the spun yarn is wound; characterized in that the yarn pooling roller further includes a first tapering section that widens from a base end section on a winding start side of the yarn pooling section towards the yarn supplying device (6, 7) side by a first inclination angle; and a second tapering section that widens from the first tapering section towards the yarn supplying device (6, 7) side by a second inclination angle that is smaller than the first inclination angle, the second tapering section is adapted to receive the spun yarn that is guided to the yarn pooling roller, and adapted to prevent, when the spun yarn is broken on the yarn supplying device (6, 7) side, an end of the spun yarn swaying around on the base end section side from moving towards a tip end section side of the yarn pooling section, and the first tapering section is adapted to guide the spun yarn received by the second tapering section to the base end section. a yarn pooling device; a yarn supplying device (6, 7) adapted to supply spun yarn that is guided to the yarn pooling device; and a winding device adapted to wind the spun yarn guided from the yarn pooling device to form a package, wherein the yarn pooling device is arranged between the yarn supplying device (6, 7) and the winding device, and is adapted to pool the spun yarn, the yarn pooling device comprising: a yarn pooling roller around which the spun yarn is wound, the yarn pooling roller including a yarn pooling section around which the spun yarn is wound; characterized in that the yarn pooling roller further includes a first tapering section that widens from a base end section on a winding start side of the yarn pooling section towards the yarn supplying device (6, 7) side by a first inclination angle; and a second tapering section that widens from the first tapering section towards the yarn supplying device (6, 7) side by a second inclination angle that is smaller than the first inclination angle, the second tapering section is adapted to receive the spun yarn that is guided to the yarn pooling roller, and adapted to prevent, when the spun yarn is broken on the yarn supplying device (6, 7) side, an end of the spun yarn swaying around on the base end section side from moving towards a tip end section side of the yarn pooling section, and the first tapering section is adapted to guide the spun yarn received by the second tapering section to the base end section. a yarn pooling roller around which the spun yarn is wound, the yarn pooling roller including a yarn pooling section around which the spun yarn is wound; characterized in that the yarn pooling roller further includes a first tapering section that widens from a base end section on a winding start side of the yarn pooling section towards the yarn supplying device (6, 7) side by a first inclination angle; and a second tapering section that widens from the first tapering section towards the yarn supplying device (6, 7) side by a second inclination angle that is smaller than the first inclination angle, a first tapering section that widens from a base end section on a winding start side of the yarn pooling section towards the yarn supplying device (6, 7) side by a first inclination angle; and a second tapering section that widens from the first tapering section towards the yarn supplying device (6, 7) side by a second inclination angle that is smaller than the first inclination angle, the second tapering section is adapted to receive the spun yarn that is guided to the yarn pooling roller, and adapted to prevent, when the spun yarn is broken on the yarn supplying device (6, 7) side, an end of the spun yarn swaying around on the base end section side from moving towards a tip end section side of the yarn pooling section, and the first tapering section is adapted to guide the spun yarn received by the second tapering section to the base end section.