The foot and ankle are fundamental to all upright locomotion performed by the human, accommodating itself to the external environment and providing a harmonious relationship between body and the external environment by propagation. The evaluation of the mechanical behavior of different structural foot elements can be used to understand the foot behavior during different phases of the gait cycle. Understanding the foot biomechanics during gait helps in the design of the orthotics and prosthetics. These data are essential for identifying abnormal patterns and characterizing impairments, disabilities, and handicaps. In this article, we will explain the basic biomechanics of the foot during the normal gait cycle.