These days, the aging population is becoming a critical social issue; the activation of the silver industry for the Y-O generation, meaning the young-old group of aged 55-64, is accelerating now. Pants are very important item to this generation, since they pursue active life with an exercise and leisure activities. Therefore, the physical, psychological, and social characters as well as the changed life style of women in the Y-O generation were reviewed, based on former studies and books. The consumer`s patterns and actual wearing conditions about slacks were researched and analyzed through the survey toward 300 women aged 55-65 living in Seoul. Based on this research, information was provided for the development of slacks pattern which is suitable to the deformed body and aesthetic consciousness of the Y-O generation.