Abstract: In a sheet lamination three-dimensional modeling method and apparatus, a three-dimensional object is formed in a stacked body by the repetitive operations of stacking and gluing a material sheet on an intermediate stacked body and cutting the material sheet in a cutting plane along the contour of each section shape at the cutting plane of the three-dimensional object. A remainder portion of each material sheet which portion does not constitute any section shape of the three-dimensional object is cut along plural intersecting division lines whose positions are shifted in turn in dependence on the position of each material sheet in a direction of stacking the material sheet so that an unnecessary portion of the stacked body except the three-dimensional object can be divided into plural pieces also in the direction of stacking the material sheet thereby to become small solid blocks and can be removed easily and speedily from the formed three-dimensional object.