The heavy metals are presented in many industrial wastewaters and it is necessary to separate them for further application or returning to natural water cycle. Generally, chemical and physical methods are efficient in removing the bulk of metal from solution at high or moderate concentrations. Biological methods of metal removal, defined as biosorption, have been recommended as cheaper and more effective techniques for removal of low concentration of heavy metals from wastewater. In addition, recovery of metal, regeneration of the biomass, no further nutrients necessity, and operating capability in environmental conditions are among the other benefits of these techniques. In biosorption processes, microorganisms including algae, fungi and bacteria use to remove the heavy metals even from very dilute solutions. Application of pretreated biomass has several advantages such as high biosorption capacity compared to the live biomass. Lead a heavy and strategic metal, widely available in industrial process waters. Regarding the importance of lead in industries and its high pollution in environment, we focused on lead biosorption from aqueous solution in this project. The fungus Mucor indicus (with yeast like and filamentous growth) was used for the biosorption in this work. Mucor indicus is able to absorb the heavy metals since the cell wall of the fungus contains appreciated level of chitin and chitosan. Different morphologies of this dimorphic fungus was used and compared for biosorption of lead. The results showed the relatively high biosorption capacity of all morphologies for the heavy metal. Different morphologies biosorption capacity of 22.07, 15.62, 14.68 and 12.12 mg/g at pH=5.5 have been observed for pure mycelium, mostly mycelium, pure yeast like and mostly yeast like morphology, respectively. Pure mycelium and pure yeast like morphologies showed the maximum and minimum of biosorption, respectively. Therefore, biomass grown in aerobic (filamentous form), and biomass grown in anaerobic (yeast like form) have the maximum and minimum of biosorption, respectively. The maximum values of biosorption were also observed at pH=5.5. Key words morphology, biomass, biosorption, fungus, isotherm, kinetic