Husserl's transition from empirical I to pure I triggered the discussion about the problem of I & no I in phenomenological circle. Sartre and Gurwitsch criticized the necessity of pure I by self-sufficiency of consciousness stream, and essentially advocated a kind of non-egological phenomenology. On the contrary, Marbach and Zahavi demonstrated the legitimacy of pure I by individualization, centralization and pre-reflective self-consciousness respectively, and argued for egological phenomenology. Through revising, complementing, integrating Marbach and Zahavi's views, this paper defends egological phenomenology.