In this paper, we have dealt with the technique of producting chairs in the Fomer Matusmoto's House. 7 chairs remain and those chairs have been producted extending over the end of Meiji and early Taisho period. We have compared each other's structure and largeness of 7 seats. As a result, we could not made clear original structure of 7 seats. But, we could made clear those design's measurment, and have found out similer measurment in those design's measurment.