The stability of dispersions of graphite in aqueous solution with ABDM (alkyl benzyl dimethyle ammonium chloride) as a surfactant was investigated. The adsorbed structures of the ABDM molecules on graphite particles were examined in relation to zeta potential and critical micelle concentration. It was found that the zeta potential seems to be strongly correlated with both ABDM monolayer and bilayer formations on the particle surfaces. The total potential energies resulting from the interaction of the ABDM adsorbed graphite particles in suspension were estimated using the DLVO theory, and highly dispersed systems were obtained at 26 kT and higher. The adsorption amount of ABDM, zeta potential, graphite powder contact angle, and particle sedimentation rate were measured to determine the dispersion stability. It was found that the high dispersible graphite suspension with settling time T-1/2 of 44.5 It at pH 10 and zeta potential of 22.5 m V was produced.