The purpose of this paper is to consider the permanent exhibitions in public museums of history and explain the transition of their exhibitions. We selected 58 museums among public museums of history opened during the postwar period, and analyzed their original permanent exhibitions. The results are as follows. It was found that the permanent exhibitions were classified 7 types (field exhibition, general history exhibition. subject exhibition, and their combinations). Permanent exhibitions of history museums turned from field exhibition into general history exhibition in the latter half in 1970's. The subject exhibition appeared in 1980's and they have spread.