Combined or heterotopic pregnancy has been regarded as extremely rare in the past three decades. If it continues without diagnosis, a life-threatening situation may occur. A case of eight-week gestation is presented in which there was threatened abortion. The patient underwent exploratory laparotomy for internal bleeding. Upon operation, combined pregnancy, with a ruptured ectopic pregnancy, was diagnosed. Left salpingectomy was performed uneventfully. Neither chronic salpingitis nor administration of ovulation-induction agents was part of past history. A viable ongoing intrauterine pregnancy continued after operation, and a normal male was delivered by cesarean section after a 39-week gestation where labor progressed too slowly for normal delivery.