Salmawaih ibn Bunan (died 840) was an Church of the East Christian physician who translated works of Galen from Greek into Arabic. He flourished at the time of the Abbasid caliphs al-Ma'mun () and al-Mu'tasim (), serving as private physician to the latter. It is reported that al-Mu'tasim trusted Salmawaih to such an extent that he called him "father", and that he prayed in person over Salmawaih's grave when he died.
He was a patron of the fellow Christian physician and translator Hunayn ibn Ishaq, helping him in his translation of Galen's On The Therapeutic Method. His scientific work included studies on the harmful effects of aphrodisiacs. He was a rival of the Christian physician Ibn Masawayh.