This study aims to analize the change of the number of specialized rooms existed at primary and junior high schools in Aichi, Gifu and Mie Prefecture in 1977 and 1985. The results are as follows ; 1) Nearly all promary schools have specialized rooms for science, music, art, homemaking and library in 1985. The number of specialized rooms for science, music, art, craft and homemaking in junior high schools have increased from 1977 to 1985. 2) In primary and junior high schools, the number of classrooms that are deverted to specialized rooms have decreased from 1977 to 1985. 3) Audio-visual room, studio and language laboratory are set up in about half of primary and junior high schools in 1985. And the number of schools that have these rooms have a tendency to increase more. 4) In case of two or more specialized rooms for a subject, they are set up in different installation, (i.e. cooking and clothing, woodwork and metalwork, painting and modeling etc.) 5) The number of the classrooms are over that of classes in 60 % of primary and 50 % of junior high scools in 1985.