The circle placed at the mouth of the woven bag is called a circular drawstring bag. Currently, knitted products such as undershirts and cardigans sometimes have pockets attached to the front and back body parts. The applicant of the present application has disclosed a method of branching from a base knit and integrally knitting a pocket knit. Patent literature discloses that by forming an upper edge portion of the pocket made of a ribbed structure above the pocket portion, a thick, built-in pocket with excellent shape retention can be formed without sewing.