SKELETON YARN AND DENIM FABRIC

Disclosed is a skeleton yarn comprising a core-ply stretch yarn (1) positioned at the center, a middle-ply fine fiber or fine yarn (2) spun made of fiber coating the surface of the core-ply stretch yarn, and an outer-ply coarse fiber or coarse yarn (3) spun made of fiber coating the surface of the middle-ply fine fiber or fine yarn spun made of fiber, wherein the middle-ply fine fiber or fine yarn spun made of fiber is a high twist fiber, and the outer-ply coarse fiber or coarse yarn spun made of fiber is a loose twist fiber. A novel retro denim fabric made from the skeleton yarn can be subjected to a normal post-finishing shrinking process, and the problems of unstable garment model and the like caused by unstable washing shrinkage can be avoided.