The device (70) for manufacturing a dental mold (90) is provided with: a structure (80) comprising a bottom plate (802) with a flat inner bottom surface and a side wall part (804) that surrounds the inner bottom surface, and having a space formed by the inner bottom surface and inner surface of the side wall part that can accommodate multiple spheres (86); and multiple support members (84, 85, 85'; 89, 89') furnished at multiple positions that correspond and are located vertical to multiple positions on the perimeter of the inner bottom surface and can support a plate (57) in a horizontal state in a form that is elastically movable in the vertical direction by the weight from said plate supported thereby. For said plate, the device (70) comprises a plate (57) with an aperture that can support the mold (60) at the edge of the aperture.