本文通过对５例阳性病人３ｄ全粪的研究，发现日本血吸虫卵在粪便中的分布具有聚集性。虫卵主要分布在粪便的表层及头端，从表面至内部及从头至尾部虫卵数有逐渐减少的趋势。随着时间的不同粪便中的虫卵计数亦有变化；又通过对４４例阳性病人的同一粪样同时制Ｋａｔｏ片１０张，结果显示随着检查次数的增加，几何均数的变化并不明显，可认为虫卵在粪便的局部是呈随机分布的。 In this paper, 5 cases of positive fecal 3d manure study and found that the distribution of Schistosoma japonicum eggs in the feces were aggregated. The eggs are mainly distributed in the stool surface and head-end, from the surface to the inside and from the beginning to the end of the number of eggs gradually reduce the number of trends. The counts of eggs in the feces changed with the passage of time. In addition, 10 Kato tablets were simultaneously made on the same fecal sample of 44 positive patients. The results showed that with the increase in the number of examinations, the geometric mean changes were not obvious , It can be considered that eggs are distributed randomly in the stool.