In this study, the shear box test was carried out by using saturated sand and fresh mortar in order to grasp the rheological properties of them. As the results, it was concluded that shear stress in dense suspension increases with increasing of shear strain, because of the disappearance of excess pore water pressure with liquefaction and the decrease of pore water pressure by dilatancy. From the experimental results obtained by using saturated sand, the coefficient of dynamic internal friction was obtained, which is needed to express the flow behavior of saturated sand. From the experimental results obtained by using fresh mortar, it was clarified that only a part of high-fluidity mortar can be expressed by Bingham's model.