The adductor longus (also adductor longus muscle, latin: musculus adductor longus) is one of the adductor muscles located in the medial region of the thigh.
The adductor longus originates from the superior ramus of the pubis. The adductor longus inserts on the shaft of the femur, specifically, onto the middle third of the medial lip of the linea aspera.
The main function of the adductor longus is adduction of the thigh. Other functions of the adductor longus include flexion and external rotation of the thigh.