Many gravity check dams have been constructed in ground sliding areas. However gravity dams have proved, due to their large volume, not to be economical and moreover to need a long construction period. In this paper we propose a thin semi-gravity check dam, the stability of which is assured by anchors fixed on the upstream side as well as by reinforcements for tensile stress. Therefore, because of its thinness, this dam can be constructed more economically. This paper describes the design method of the semi-gravity check dam employing with anchors. In the design method, the most suitable upstream slope, as well as the tension in the anchors, were determined by usual stability calculation. In order to determine the stress distribution in the dam body, elastic analysis was carried out by two-dimensional finite element method. Eventually, as results from the analysis, we disposed the necessary reinforcement in the dam structure.