Aniruddha Mahathera (Devanagari: ???????? ???????) (born Gaja Ratna Tuladhar) (15 December 1915 – 17 February 2003) was a Nepalese Buddhist monk and the Sangha Nayak (Patriarch) of Nepal from 1998 until his death in 2003.
He was one of the most important figures in the revival of Theravada Buddhism in Nepal and the development of Lumbini, the Buddha's birthplace in southern Nepal, into a center of international pilgrimage.