Studies are made for the analysis of the fiber distribution in the blended yarn of cotton and polypropylene by statistical methods. This study has the same results as those of others i.e, the thick and short fibers are distributed in the outer side of yarn cross-section, but the differences between the blending ratios of the speciments become significant when the differences in fiber fineness and those of length reach a certain level. Fiber length could be considered as the major factor for the fiber distribution in the yarn cross-section and fiber fineness is the minor.