Lowmolecularmass organic gelator (LMOG) Noctadecyl succinic acid was synthesized from succinic anhydride and octadecylamine by ringopen reaction. The structure of gelator was confirmed by 1HNMR and 13CNMR. The gelation ability was inspected by a typical experiment including heatingcooling to form gel and inverting the test tube without deformation of the gel. The results indicate that the Noctadecylcotadecylamine can form the oreticalorganogels in different organic solvents. The selfassemble in the organogel was studied and a preliminary gelation mechanism was proposed.