The main objective of the paper is to show the phenomenologically determined subjectivity in the frame of interiority through tracing the Cartesian path of the two most influential “Cartesian” phenomenologists E. Husserl and M. Henry. It is claimed that Husserl ́s return to the Cartesian Cogito – a critical rather than dogmatic step – enables him to define subjectivity as an experience of the self-consciousness uniting the experience made possible by the reduction. Henry, on the other hand, reveals Descartes’ conceptual ambiguity and thus makes the rehabilitation, from the phenomenological perspective, of the concepts of substance and the clear and materially real idea possible. His conclusion is that Descartes in fact made the reduction and thus opened the way to the primordial sphere of phenomena. Thereby he suggested the phenomenological subjectivity, whose interiority means exclusively self-affection.