This study was conducted to investigate the prevalence of dysmenorrhea in women labor workers The subjects were 327 women labor workers in the area of Kyunggi. Kyungsang and Chunla Provinclils. The data were collected from 20. January to 20. February. 1999 by using self-administered structured questionnaires. The contents of, questionnaire were composed of demographic(3 items). work related(2 items). life style (6 items), obstetric-menstrual(8 items) characteristics. and experiences of dysmenorrhea(6 items). The results were as follows 1. Prevalence rate of dysmenorrhea was $76.8\%$. Among women who had dysmenorrhea. $52.0\%$ of them had family history on dysmenorrhea. $46.0\%$ of them experienced limitation of daily activities. $18.3\%$ of them have started the dysmenorrhea since their employment present company. and $8.8\%$ of them visited hospital due to dysmenorrhea of the subjects who took analgesics for relieving menstrnal pain. $7.2\%$ had no effect. 2. The frequency of dysmenorrhea was significantly different by educational level. working period. and the amount of mentrual flow.