On this study, I suggest planning of suitable bridges for islands promotion. An economic effects in islands is caused by new industry from outside at present. However, it is not desirable. Because it is guidance to decline local industry in islands. The outline is as follows: 1. This study's purpose is influence of bridge construction on the tourist industry in islands make clear. 2. The casestudy area is Geiyo islands. Here has built bridges to connect Honsyu with Shikoku.
