本文报道日本血吸虫大陆株染色体的数目为2n=16,n=8。其核型分为三组:第一组,1～2号染色体,1号为大的亚端部着丝点。2号为大的亚中部着丝点,系性染色体,雌性为异配性别(ZW):雄性为同配性别(ZZ)。第二组,3～5号染色体,为亚端部着丝点。第三组,6～8号染色体,为亚端部和中部着丝点。日本血吸虫大陆株核型与曼氏血吸虫核型有明显不同,符合亚洲组裂体吸虫表现。 This article reports the number of Schistosoma japonicum mainland chromosome 2n = 16, n = 8. The karyotype is divided into three groups: the first group, chromosomes 1 to 2, No. 1 for the large sub-centromere. 2 is a large sub-central centromere, the Department of Chromosomes, female heterosexual sex (ZW): male with the same sex (ZZ). The second group, chromosomes 3 to 5, for the sub-end centromere. The third group, chromosomes 6-8, are sub-end and middle centromere. Schistosoma japonicum karyotype and Schistosoma mansoni karyotype karyotypes are significantly different, in line with Asian group schistosome performance.