The purpose for The ability to extract tannin and efficiency of solvent extracted tannin.The scope of the study is the use of guava leaf extract for tannins. The experiment was conducted in laboratory 1 at Princess Chulabhorn CollegeChiangrai. The leaves were dried guava frame then blended thoroughly, then divided into three parts.To put acetone solution,ethyl alcohol, and to bring water to extract tannin for about 2 days with a white cloth and put a pad and paper filter.And