The reproductive health has been concerned by many researchers as well as workers. In this subject, the authors focus on the knowledge about reproductive health of the young migration worker in Dinh Tram Industrial Area, Bac Giang. The result showed that only 38.5 percent of those realize the time that will be impregnated exactly, 68.5 percent realized that "menstrual flux stopped", is the pregnant signal if they had sexual. Over 40 percent assumed that if anyone has the good surface also has no HIV. And about 80 percent know the result of artifical abortion may bring to barren, but other results under 50 percent.