This studied the change of the apparatus of doorframe till Nara period. ・There were the thick board as the pivot and heiziku formerly. First, nagesi was a member of holding the windowframes, later became the pivot and structural. So the thick board became disused. ・Heiziku took over the function of hentuki.The first, using heiziku around door was Kondo in T6sy6daizi-temple.Because heiziku had flat only on the front, the pivoting part had been square section. ・The first, nagesi as the pivot was KairO in HoryQzi-temple. Pivoted doors by kabuki-nagesi and han-nagesi was established at GozyQ-no-to in Daigozi-temple at least.
