Kartavirya Arjuna (, ; also known as Sahasrabahu Arjuna or Sahasrarjuna) was a legendary king of an ancient Haihayas kingdom with capital at Mahishmati which is on the banks of Narmada River in the current state of Madhya Pradesh. Kartavirya was son of Kritavirya, king of the Haihayas. According to the Puranas, Haihaya was the grandson of Sahasrajit, son of Yadu. This is his patronymic, by which he is best known; he is also referred to simply as Arjuna. He is described as having a thousand hands and a great devotee of god Dattatreya. One of the several such accounts states that Arjuna conquered Mahishmati city from Karkotaka Naga, a Naga chief and made it his fortress-capital.