This paper aims to illustrate the framework of analogical thoughts on large span buildings by contemporary Japanese architects. Firstly, we extracted the reference object, to which is compared large span building in analogical expression represented on the design theories. Addtionally, we examined what kinds of aspect were refered from these objects. Secondly, architects' intention of analogical expression was extracted from the articles and analyzed. Finally, the relationship between the reference aspect and the intention of analogical expression were examined totally.