Samding Dorje Phagmo Sachen Kunga Nyingpo (Tibetan: ས་ཆེན་ཀུན་དགའ་སྙིང་པོ་, Wylie: Sa-chen Kun-dga’ Snying-po) (1092–1158) was a Tibetan spiritual leader and the first of the Five Venerable Supreme Sakya Masters of Tibet.
At the age of twelve, Sachen, under the guidance of his guru, Bari Lotsava, performed one-point meditation on Manjushri.
After meditating on this for a continuous period of six months, the bodhisattva appeared in front of him and gave him the teachings on the parting of four attachments as follows: Sachen realised in an instant that this teaching contained the essence of the Path of Perfection.
He was a strict vegetarian[1] and received teachings and empowerments on sutras and tantras from many great teachers, including his father and Virupa.
Sachen passed all the doctrines to his two sons, Sonam Tsemo and Drakpa Gyaltsen.