Against the immutable substance Atman of Upanishad we compared Buddhist theory of nonsubstantiality(Anatman), and studied the Non-ego-entity concept through the early buddhism, the Abhidharma, and the Yogacara Buddhism. The paradoxical situation between the denial of a permanent self and the acceptance of the doctrine of rebirth had been resolved by the concept of Karma, and its continuation via the omniscient Alaya-vijinana.The nonsubstantiality doctrine was elaborated by the ontological categories of five-level hundred dharma, and the epistemological system of eight conciousness. The Alaya-conciousness system of Yogacara Buddhism is compared with the collective unconciousness of the analytic psychology, especially in terms of the non-ego-entity and Suchness of the former, and the self and Self-realization of the latter.