The aim of this paper is to study the structure of Louis I. Kahn's Psyche in his architectural creation. Firstly, I introduce Kahn's philosophy of architectural creation and the concept of Psyche. Secondly, I compare Kahn's PSYCHE with C.G.Jung's Psyche. As a result, Kahn's PSYCHE is composed of INA which consist of pure consciousness and WILL which is consciousness to characterize, and Jung's Psyche is composed consciousness and unconsciousness. INA and WILL relates to Jung's Archetype and Instinct in unconsciousness. Thereupon, if it is interpreted that INA would be the key to open Archetype and WILL would be the key to open Instinct in unconsciousness, Kahn's concept of PSYCHE is similar to Jung's concept of Psyche.
