There was a cloth made by plant fiber called Tonbyan/Tonban (there are some slight different names). " 桐板布 " or " 桐板齊 " was assigned to the cloth in Chinese character. Even now, because specification of the material is not ended, the cloth changes into something illusivethings. New knowledges are introduced by investigation of old literatures and by researches of old clothes using microscope in this paper. To give the conclusion, there were two or more different type plant fibers called sound like "Tonbyan/ Tonban" and they were written as " 桐板 ". And Indeed, A piece of old cloth is made of a plant fiber of maguey called Tonbyan in Okinawa which is shown in this paper.