Roll mold for sample preparation for transmission electron microscopy in real time according to the present invention, the tensile is , with the upper roller and the lower roller rotates relative to the center of rotation do not intersect each other , said upper roller and a lower roller to provide a resilient restoring force of the upper roller as in any one compression means for generating a compressive force to the outer surface of the lower roller and , by providing a rotating force to the upper roller and lower roller comprising any one of a forced rotating force to rotate in opposite directions to each other , the outer surface of the upper roller and the lower roller , the tension for real-time transmission electron microscope observation by pressing a thin plate material characterized by the molding portion formed of a plurality for forming the sample . ;
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