PURPOSE: To obtain a woven or knit fabric having high air-content and excellent bulkiness, softness and heat-insulation while preventing the damage of fibroin and consequent generation of nep.

CONSTITUTION: The spinning of raw silk yarn is carried out without removing sericin from short cut cocoon fiber. The woven or knit fabric is manufactured by spinning the spun raw silk yarn produced by spinning short cut cocoon fiber without removing sericin and weaving or knitting the fiber after removing sericin by degumming or removing the total or a part of sericin from a woven or knit fabric produced from the fiber without degumming.