Triratna Man Tuladhar (Devanagari: त्रिरत्न मान तुलाधर) (1905-1986) was one of the largest Nepalese traders in traditional Tibet and the president of the Nepalese Chamber of Commerce, Lhasa in the 1940s.
Triratna Man (alternative name: Lhandur) was born at Nyata, Kathmandu, the eldest of the three sons of trader and philanthropist Dharma Man Tuladhar and mother Hera Lani Tuladhar. He was educated at home, and taught himself English and Chinese. He learned Tibetan and Hindi during his stay in Tibet and India. In 1913, he was married to Punya Maya Kansakar.
Triratna Man was also an activist in the movement to revive Theravada Buddhism in Nepal; and in 1924, became a member of the Buddhist Relief Association founded by Buddhist scholar and leader Dharmaditya Dharmacharya.
Triratna Man belonged to a long line of Lhasa Newar merchants. His family owned a business house in Lhasa known as Chhusingsyar which has a history dating from 1790 AD. The firm conducted trade between Nepal, India and Tibet. Its main business was musk, brocade, gems, textiles and general merchandise. Besides its main shop in Lhasa, the firm maintained shops in Gyantse and Phari in Tibet, and in Kalimpong, Kolkata and Ladakh in India. The firm in Kolkata was known as Dharma Man Purna Man - Tibetan Musk Depot.
Triratna Man went to Lhasa for the first time in 1928 and managed the family business. He returned to Nepal in 1929. He made two more trips to Lhasa, and lived there from 1935-1941 and from 1947-1953, spending a total of 13 years in Tibet.