Effects of ovarian transplantation on sperms and reproductive ability of male recipient mice were investigated by designing group A, B for ovarian transplantation and group contorl. 1-day-old mouse ovaries were transplanted into kidney capsule of adult male mice and collected to observe their status of development,recovere oocytes were recovered from ovarian groofts on day 21 and 28 after the transplantation in groups A and B respectively. At the same time, the testes and sperms from epididymies of male recipients were observed morphologically and the number of abnormal sperms were counted. The litter size for the female mice mated with male recipients was recorded for evaluation of reproductive ability of recipients. The retrieved grafts developed with many antral follicles and there was no significant ifference in the number of collected oocytes between group A and B(P>0.05).The notable morphological changes of recipient testes were not found and the rate of abnormal sperms in grafted groups did not differ from control grou (P>0.05). The litter size for the female mice mated with male recipients was also comparabale to male mice in the control group(P>0.05). It could be demonstrated basically that heterosexual ovarian transplantation has no significant effect on sperms and reproductive ability of male recipient mice.