PURPOSE: To obtain spun yarns of fine count rich in uniformity with improved spinning properties, by drafting a primarily drafted sliver in a nipping type twisting apparatus and an entangling means just on the downstream side therefrom, and hard twisting the sliver at the same time.

CONSTITUTION: A sliver of short fibers formed by carding, etc. is fed to feed rolls 2, and drafted by apron rolls 3 and delivery rolls 4, introduced into a nipping twisting apparatus 5, e.g. consisting of two endless belts, and an entangling nozzle 6 provided just on the downstream side therefrom and then taken off by taking off rolls 8. The sliver 1 is then hard twisted at 1,000T/m or more and drafted at the same time to form a spun yarn 1', which is then introduced into the entangling nozzle 6 in the state of remaining SZ twists under lower tension on the outlet side than on the inlet side and firmly interlaced to give the aimed spun yarn 1".