Vimalamitra; 無垢友, 無垢論師; Tibetan: དྲི་མེད་བཤེས་གཉེན (Drimé Shenyen); Wylie: dri med bshes gnyen; Sanskrit: Vimalamitra;
Vimalamitra was an eighth-century Indian monk, a Dzogchen master. He was invited to Tibet by King Trisong Detsen. He translated a large body of Tantric text into Tibetan including Guhyasamaja and Guhyagarbha. He later travelled to the Wutai Mountain in China, He was said to have vowed to take rebirth to teach dharma every hundred years in Tibet.
無垢論師, 無垢友, 是公元八世紀印度的一位佛教密宗僧人，在赤松德贊時期，到吐蕃傳播密宗教法，在印度僧人中地位僅次於蓮花生和寂護。他翻譯《密集》等密宗典籍成藏文。他被寧瑪派尊奉為大圓滿傳承的主要祖師之一。