This investigation was carried out to study the effect of heating treatment on the saponin fractions in ginseng extract and crude saponin. The changes of saponin patterns and amounts were investigated using HPLC and compared with peak area of each fraction. Shape of crude saponin was changed more easy to compare with in ginseng extract. The more extracting temperature risen and treated time longer, the more changes of saponin amounts and patterns were shown, expecially at $100^{circ}C$ over. All of the saponin fraction except ginsenoside-Rd were relatively unstable in heating treatment. Suitable extracting condition was extracted at $80^{circ}C$ for 40 hours with $H_2O$.