To obtain a yarn, a fiber structure and a textile product excellent in color fastness to light and deodorant performances without deteriorating a touch feeling of the yarn, woven fabrics and knitted fabrics as a fabric.

This composite yarn excellent in color fastness to light and deodorant properties is characterized by having a fiber subjected to graft polymerization with a hydrophilic vinyl-based monomer in the core part and having other fiber than the above fiber in the sheath part and the textile product is provided by using the composite yarn.