The purpose of this study was investigate the historical change in Kasa for the Buddhist commandment in the era of Buddha and the Korean Kasa. The original Kasa specified in Buddhist commandment has many concrete features. In contrast Korean Kasa is quite simplified and become very practical. Although we could not follow the numerous original specifications in Kasa, we must maintain and transmit Korean Kasa based in the minimum regurations. For this purpose, it is necessary to form a unified opinion and to develop a desirable specification for the Korean Kasa.