Chandra Mohan Jain (Hindi: चन्द्र मोहन जैन) (born December 11, 1931 – died January 19, 1990), also known as Acharya Rajneesh from 1960 onwards, Bhagwan Shree Rajneesh from 1970 to 1980, and Osho from 1989, was an Indian mystic, guru, and spiritual teacher with followers worldwide.

A professor of philosophy, he traveled throughout India during the 1960s as a public speaker. His outspoken criticism of socialism, Mahatma Gandhi, and organized religions generated controversy. He advocated a more open attitude toward sexual relations, earning him the nickname “Sex Guru” in the Indian and later international press.