Background: The plantaris has a small belly with a thin slender tendon in the posterior compartment of leg. It__ampersandsignrsquo;s a vestigial muscle which has gained importance because of its use in tendon grafting. It arises from lateral supracondylar ridge of femur and gets inserted into tendoachillis. It is innervated by tibial nerve and contributes in flexion of knee joint and plantar flexion of the ankle. Aim: The aim of study is to determine origin, insertion length of the muscle belly, length of the tendon inside the muscle belly, width of the tendon and total length of the tendon of plantaris muscle in south Indian population. Materials and Method: The present study was carried out on 50 lower extremities from formalin-fixed cadavers irrespective of age, sex and race in the Department of Anatomy, M.S.Ramaiah Medical College. Details of the morphometric measurements of plantaris muscle such as length of the muscle belly, length of the tendon inside the muscle belly, width of the tendon and total length of the tendon, and anatomical variations were noted and measured with a digital vernier caliper, appropriate photographs were taken and results were tabulated after statistical analysis.. Results: In present study, frequency of plantaris muscle is 88.46% in left and 91.66% in right . Themean length of muscle belly was 9.444cm and mean muscle belly width was 1.944cm and total tendon length was 38.028cm and width of tendon was 0.3549cm. Conclusion: The knowledge of morphometric measurements of plantaris muscle is of importance to radiologists, physiotherapists, orthopaedicians, plastic surgeons, clinicians because of use of muscle tendon in reconstructions, diagnosing muscle tears, MRI intepretation, repair of Atrioventricular valves and muscle injuries.