This study identifies the various views on the baseball introduction in Korea as examining the existing studies. For this purpose, this study breaks down the views on the baseball introduction into view on the introduction in 1904, view on the introduction in 1905 and view on the introduction in 1907 found out the conclusions as follows. In Korea, since Na Hyung-Seong insisted the introduction of baseball in 1905, diverse studies quoted his opinion. Then, the view on the introduction of baseball in 1905 was the established theory. However, as examiningthe actual bases, Na Hyung-Seong quoted "history of Chosun Baseball" of Osima, but it was considered that on year was added(the 37th year of Meiji period=1904) during translation. And the view on the introduction in 1904 was appeared in "History of Chosun Baseball" written by Lee Gil-Yong, which was considered to be the first record on the Korean baseball history two years prior to Osima. Therefore, the baseball was firstly introduction for YMCA members in Korea by Phillip L. Gillett, the American missionary in 1904 in accordance with the examination up to now. However, to clarify the view on the baseball introduction in Korea, it is necessary to examine Gillett who introduced the baseball and exploit the data related to baseball activities among foreigners in Busan and Incheon opened from the end of 19th century, It will be the subject for the future studies.