The purpose of this paper is to clarify Le Corbusier's design method on facade of buildings. At first, we arrange five facade types, according to the explanation by Le Corbusier ; 'fenetre en longuerur(window long aside)', 'pan de verre (glass wall)', 'brise-soleil (sun-breaker)', 'loggia' and 'claustra'. Through the analysis of the raltionship between these types and the design process of each building, we find that Le Corbusier's facade design indludes hte affirmation and the negation of the 'wall' at the same time. That means, Le Corbusier studied the environmental condition by these facade types, and tried to realize the phenomenal openness. This is the goal of 'la facade libre (free facade)'.