As a result of inquiry about menarche age, existence or non-existence of menstruation, comparative menarche age by regina groups, and monthly occurrence rate of menarche among 1642 school girls in Kwangju district, we obtained the following conclusion. 1. The menarche age of school girls in Kwangju district was 10-17, and the average age was 14.03$pm$1.85. 2. According to the percentage of menarche occurrence by the present age. we got a fact that 58.67% had menarche at 13 to 15-year-old school girls. So the tendency is that menarche occurs sooner by degrees. 3. As a result of inquiry about the existence or non-existence of menarche by the present age, 54.54% have not had menarche among 15-year-old school girls. There is one person who have not had it at 18, and none that have not had it at over 19. 4. The menarche age by regional groups shows that menarche occurs at 13.85 in the city and at 14.27 in the country: those inhabited in the city have menarche sooner than those in the country. 5. Monthly rate of menarche occurrence shows that August in the largest number, December the second, January the third, and so on.