The cotton pants 1 as a pair of pants with the L pocket is that the front and the reverse edge 3Ab of the storing part 3A is perpendicular against the length direction of the belt part 3, therefore all the sewing process can be done by sewing machine and the mass productivity can be kept. Also because the upper edge of the raw fabric which does not have the rectangle expansion and contraction inside the elongating part 3B is sewn on and the lower edge of the raw fabric which does not have expansion and contraction is sewn on the lower edge of the belt part 3, one part of the raw fabric 6 which does not have expansion and contraction can be seen even if the one who wears it turns over the lower edge of the elongating part 3B by curiosity and the inner structure of the stretch stopper material 11 etc. can not be seen, therefore the situation that the one who wears it pulls out the inner structure and destroys the structure which is capable of expansion and contraction can definitely be prevented.