Kartavirya Arjuna (, ; also known as Sahastrabahu Arjuna) was a legendary king of an ancient Haihayas kingdom with capital at Mahishamati which is on the banks of Narmada River in the current state of Madhya Pradesh. Kartavirya was son of Kritavirya, king of the Haihayas. This is his patronymic, by which he is best known; his real name was Kartaviryarjuna. He is described as having a thousand hands and a great devotee of god Dattatreya. Eventually Kartavirya was brutally defeated and slain by the powerful sage, Parashurama.