A novel class of low-molecular-weight organic gels has been developed; N,N':N ''-tristearyltrimesamide (TSTA) forms gels with various organic solvents, immobilizing solvent at a low concentration of TSTA. The gels, which form fibrous bundles leading to three-dimensional networks, exhibit well-defined sol-gel transitions. Both intermolecular hydrogen bonding and intermolecular interactions between long alkyl chains are suggested to be responsible for the formation of gels.