The purpose of this study was to investigate the possibility of Inonotus obiquus as an functional resources. We carried out to develop a beverage by using Inonotus obliquus, and we examined the effects of beverage on the reduction of serum lipid and improvement of blood parameters in rats fed high fat diet 5 weeks. Sprague-Dawley rat weigh $150;g{pm}15;g$, were randomly assigned to 4 groups, basal diet only(BDG), high fat diet without beverage(FDCG), high fat diet and 10% beverage(FD10M), high fat diet and 20% beverage(FD20M). The result of this study were as follow. Hematological datas of 4 groups were same level, which were not significant. Serum GOT activity were reasonable levels in FD10M and FD20M groups compared to FDCG group. Total cholesterol, LDL-cholesterol, triglyceride in serum and atherogenic index were remarkably reduced in beverage supplemented groups as compared control group. These results imply that beverage from Inonotus obliquus could be used as possible for decrease of serum lipid concentration.