Abstract
Firstly this paper will discuss the trends of main economic studies on a tourism phenomenon. Particularly, we summarize on the trends of tourism economic studies from the viewpoint of microeconomics and macroeconomics that are the field of modern economics. In microeconomics, the trends of tourism economic studies will be summarized from three domains of tourism demand, tourism supply, and tourism market. In macroeconomics, they will be summarized from three domains of the national economy, the international economy, and the regional economy. Finally, we take up the issues on the tourism economic study and consider future trends.