For the information on micellization at each ginsenoside level aqueous solution of purified saponin of Panax ginseng root was dialyzed through dialysis tubing (MW 12,000) or eluted through Bio-Gel P-2 (MW 200-2,000) and analysed for ginsenosides by high performance liquid chromatography. Ginsenosides can be classified into three groups depending upon molecular aggregation pattern and spatial arrangement of hydrophilic parts in molecule. Group Ⅰ that is large micelle former(aggregation number: above 10) and one side hydrophilic part (HP) includes ginsenosides Rb₁, Rb₂, Rc and Rd (diols). Group Ⅱ thai is small micelle former (aggregation number:$gt; 10-1) and semi-two sales HP includes Rg₂, Rf (triol) and Rg₃ (diol). Group Ⅲ that is no micelle former (aggregation number: 1) and two sides HP includes Re and Rg₁ (triol).