In this study, Sargassum muticum (Yendo) Fensholt was evaluated as an economic and accessible biosorbent capable of removing phenol ions from aqueous solutions. The effects of the functional parameters, e.g., pH value of solution, dose of biosorbent, and initial concentration of phenol and contact time, were assayed in batch mode in the experiment. The optimum adsorption for the removal of phenol from aqueous solutions via Sargassum m. was at the amount of 250 mg dry powder of Sargassum m. for 100 mg/L of phenol at PH value of 3 after 24 hours of adsorption. The adsorption efficiency of phenol was dependent on adsorbent dosage of Sargassum muticum, pH of solution, contact time and initial phenol concentration and the adsorption capacity increased with decreasing the initial phenol concentration in aqueous solution, the low cost bio sorbent (Sargassum muticum) can be used for the removal of phenol from industrial waste water. This laboratory treatment strategy for the polluted water could be applied in a wide-scale treatment strategy.