The pectineus (also pectineus muscle, latin: musculus pectineus) is a flat, quadrangular muscle situated in the medial region of the thigh.
The pectineus originates from the pectineal line of the pubic bone, also known as the pecten pubis.
Fibers of the pectineus muscle pass downward and in posterolateral direction and insert onto the pectineal line of the femur.
The main function of the pectineus is flexion of the hip. Other actions provided by the pectineus muscle are adduction and external rotation of the hip.
The pectineus muscle is one of the five muscles of the medial compartment of the thigh.
Medial compartment of the thigh muscles consist of: