The purpose of this study is to provide an intuitive and efficient interface system of the free-form surface modeler for the operator. To realize this, we apply Artificial Reality (AR) to the surface modeler. In this paper, we describe the special functions of the modeler: 1) the bilateral I/O device through which the position and orientation of the operator’s hand and flexing angle of his fingers can be measured and reactionary force can be returned; 2) gesture analysis of the operator’s hand, which enables him to generate the shape of curves and surfaces; and 3) the deformation of the shape of the curves and the surfaces based on the elastic deformable model with force feedback to the operator’s hand through the bilateral I/O device.