Despite more than 40 years having passed since the introduction of business administration to Korea, as measured from the founding of the Korean Academic Society of Business Administration, Korean business administration has yet to be fully established as an independent discipline. As part of efforts to establish Korean business administration, this study examined the influence of foreign business administration at the time of its introduction to Korea from two perspectives: (a) the country-specific influence centered on Japan, Germany, and the United States, and (b) the influence exerted through various channels including literature, education, study abroad, practice, and institutional frameworks. Since liberation, Korean business administration has gradually shifted from the influence of Betriebswirtschaftslehre (business economics), which was centered on Japanese education, literature, and study abroad as well as German literature, to the influence of American business administration through diverse channels. Beginning in 1955, departments of business administration started to be established at universities, and curricula also came under the influence of American business administration. These efforts led to the translation and publication of American business administration texts and the publication of numerous business administration-related books around 1960. From 1958 onward, research and study abroad in the United States, including through the Washington Project, began in earnest. During the same period, the Korea Productivity Center, the Korean Academic Society of Business Administration, and business research institutes at various universities were established. In particular, through the Korean military's exchanges with the U.S. military after the Korean War, American business administration's planning systems and management theories were transferred to Korea, and diverse educational methods including case studies began to be applied. In practice as well, from the mid-1950s, new management techniques were introduced and put into operation in the construction of key industries, including the Chungju Fertilizer Plant. The influence of American business administration has persisted and expanded over the past 40-some years to the present day.