Abstarct: Wide application of dyes in industries leads to creation of considerable volume of color wastewater that creates numerous environmental problems. Among different methods to treat such wastewater, sorption especially using biosorbent, has attracted more attention. In this study, the removal of methylene blue (MB) from an aqueous solution using the powder of steam and leaf of Albizia Julibrissin was investigated. The effect of pH, adsorbent dosage, contact time, and initial MB concentration were studied. The results showed that maximum sorption of 91.40% and 88.60% achieved at pH=8, adsorbent dosage of 1.5g/L, contact time=3min and MB initial concentration=5ppm using steam and leaf powder respectively. baxse on the results, sorption process follows the Freundlich isotherm model. The sorption kinetics were found to follow a pseudo-second-order kinetic for two sorbents.