a plating for the second kind knitting yarn 12 are used as the knitting yarn having a lower stretch force to put it concretely as shown in fig6 the first set up part 2 a of the set up area 2 consists of two courses and knit by repeating 1 wale knit and 3 wale miss the second set up part 2 b consists of three courses and knit by repeating 1 wale tuck and 3 wale miss in the welt knitting area 3 the courses c 6 c 8 c 9 c 11 c 12 c 14 and c 15 are knit only by the above mentioned knitting yarn 14 as described above after knitting the course c 6 of knit only by the knitting yarn 14 knitting one course of repeating 1 wale tuck and 1 wale miss with the first kind knitting yarn 11 having a higher stretch force then the pattern of knitting two continuous courses of knit only and one course of repeating 1 wale tuck and 1 wale miss is repeated also in the fourth embodiment the moderate tightening force is applied so that wearing comfortability is obtained the feel of the texture improves and the texture is effectively prevented from curling outward the fifth embodiment shows underpants 20 formed by the two tubular knit fabrics 1 of fig1 the two tubular fabrics 2 are arranged side by side and the upper adjacent portions of the two tubular fabrics 2 to be a rise are cut and sew to form the underpants 20 as for this underpants 20 the both leg hems are formed single welt with the set up area 2 being.