One of the most important factors in the design procedure of humanoid robots is to realize an anthropomorphic structure. In this regard, the design and fabrication department has had a prevailing role in realizing a structure consistent with the human body anatomy. Since so many parameters take part in the performance of these sophisticated machines, making a compromise between the functionality of the robot and its appearance is a challenging task. So, bringing the various criteria to a harmony and making a compromise between them has been the main assignment of the Mechanical Design department during SURENA III project. Also, this group has been in a close collaboration with the Fabrication, Dynamics & Control, as well as Electronic departments to consider their design restrictions.