《王羲之草書孝經》是東晉王羲之書寫的《孝經》，為中國早已失傳而僅存日本之作。透過考察書中見存十六位中日歷代書家所留跋文、印鑑，大致明確此本是王羲之為晉成帝作爲學習《孝經》而寫的教材，曾收藏唐宋兩代宮廷；唐代玄宗皇帝為之序，宋代流入民間，先後為北宋米芾父子及明代項元汴等人收藏；約明代前期，其本傳入朝鮮，元祿年間，豊臣秀吉出兵朝鮮時被伊達政宗掠至日本，成爲陸奥國仙臺藩歷代藩主的秘藏。筆者所見本為東京國會圖書館等藏日人摹刻拓本，祖本是否現存尚不可查。此書的價值在於，為六朝隋唐《孝經》學研究及王羲之生平書法研究，乃至中日書法史、東亞文化交流史研究，皆可提供有價值的文獻參考。

“Wang-xi-zhi's Caoshu Hsiao-Ching” was written by Wang-xi-zhi in Dong-Jin Dynasty. It has been failed to be handed down from past generations in China but still exists in Japan. This book was a textbook for Emperor Jin Cheng Di to learn “Hsiao-Ching” , and it had been stored in Tang Dynasty and Song Dynasty's imperial palace. Emperor Tang Xuan Zong wrote the foreword for this book. It spread through out the country in Song Dynasty. In the beginning of Ming Dynasty, it spread to Korea and when Toyotomi-hideyosi sent soldiers to Korea, Date-masamune stole it to Japan and it became Sendai Hansyu's secret storage. This study investigated the copies of stamps which were found by Japanese and stored in Tokyo National Library. The value of this book is to offer a reference for the study of “Hsiao-Ching” in Liu Chao Sui Tang as well as Wang-xi-zhi's calligraphy. It also is valuable for the study of the history of calligraphy in China and Japan, as well as the history of east Asia culture interchange.