This study was designed to investigate the effects of long-term training on the lipid (triglyceride, cholesterol) and lipoprotein(HDL-cholesterol). The subjects consisted of 9 junior female basketball players. (exercise career, three months: A group) and 6 athletes (exercise career, fifteen months: B group) and 12 junior school girls as control group(C group) who all were about thirteen years old. Both athlete groups(A,B group) continued to participate in six month training and their blood samples were collected at pre, mid(after three month) and post(after six month). The control subjects donated their blood at pre and post(after six month). The collected blood were analyzed for the triglyceride, cholesterol, High density lipoprotein cholesterol and HDL-C /TC ratio. The result through the statistical analysis of this data were summarized as follow: 1. The pre-levels of triglyceride and total cholesterol in the athlete groups, especially in B group were lower than those in Non-athlete group(P＜0.01). The HDL-C level and HDL-C /TC ratio were the highest in B group among three groups(P＜0.05). 2. HDL-C level and HDL-C /TC ratio in both athlete groups, especially in A group were significantly decreased after three and six months(P＜0.01) while in control group all items were not changed. This result indicates that triglyceride cholesterol in pre-adolescent girl can be significantly changed by three month training and the change of HDL-C needs more long term training(more than three month).