Aim: The aim of this study to determine the Posterior Cruciate Ligament reconstruction with peroneus longus tendon graft. Methods: 12 patients with chronic injury (> 6 months), Presence of an ‘isolated’ PCL were included in this study. The diagnosis of chronic ligament rupture was established with clinical examination and imaging (Magnetic resonance imaging, MRI). Post-operative functional outcome (IKDC, Modified Cincinnati, and Lysholm) were recorded 18 months after surgery with direct patient examination and a guided-interview by a single orthopaedic surgeon outside the surgical team