PURPOSE: To provide the subject hard twist yarn having specific strength and shrinkage degree, having a good craping property, capable of being dyed in the same color under the ordinary pressure as in the cases of nylon, silk, etc., and employed for high grade wears by using a polyester copolymerized with polyethylene glycol having a specific mol. wt.

CONSTITUTION: The objective hard twist yarn having a single filament fineness of 3.0-6.0 g/d, a boiling water shrinkage degree of 3-23% and a twist multiplier of 70-500 comprises (A) an ordinary pressure dyeable polyester copolymerized with (B) 6.0-10wt.% of polyethylene glycol having an average mol. wt. of 500-4000, and preferably contains (C) 0.05-1.0wt.% of an antioxidant (e.g. a hindered phenol).