Functional rehabilitation program after Achilles tendon repair is now widely used in postoperative Achilles tendon rehabilitation. This program has been developed to reduce or prevent these risks due to long-term immobilization in the traditional rehabilitation protocol, complications such as joint stiffness, muscle atrophy, tendocutaneous adhesion, and deep vein thrombosis. Functional rehabilitation is a rehabilitation program that permits early mobilization and functional activities with the weight bearing that can be tolerated by the patient at the earliest possible time. The most important principle of this program, i.e. early weight bearing and functional activities; increases the vascularity of the Achilles tendon, enables re-organization and re-orientation of collagenous fibers, develops and matures the tendon structure. Clinical outcomes are better than traditional rehabilitation practices, and allows the patient to safely return to the former activity level and sport. In this section, the content of the functional rehabilitation program applied after the Achilles tendon repair is described as 5 periods including postoperative period and return to sports period.