A desire to lightness of architecture has continued from the past to today. As Paul Virilio mentioned "The aesthetics of disappearance starts from a desire", the desire of architecture to lightness assumes the connection to hidden dimension of everything over the freedom of materials when it is related to the aesthetics of disappearance. This study assumes that the lightness of an architecture today can be interpreted by means of the aesthetics of disappearance. The lightness of an architecture is a concept for the potential possibility of an architecture. Therefore, it is to analyze the relationship by connecting the features of the lightness which is obtained from the examples of the Cartier foundation of Jean Nouvel and Seattle central library of Rem Koolhaas to the aesthetics of disappearance, that is, the disappearance of the materials, disappearance of the subjects, disappearance of the meaning and disappearance of physical. Based on these, it is also to prove the influence of the aesthetic of disappearance on the architecture as a social phenomenon of technology today.