Volumetric Apparatus and Densimeter in non liquid usage type composes of cylinder which is in shape of tube for filling in by the object needed to be measured with inside pushing support stick for supporting the moving forth-back of pushing stick to transmit the pressure force to make pushing support stick moving forth-back to be able to move forth-back. The moving forth-back of said pushing support stick is to measure the distance of the moving forth-back compared with original distance by send-receive signal transmitter equipped outside cylinder. The cylinder is separated into two parts of which each part supports for in-out pressure by inside pushing stick that push in-pull out by external force to measure the object needed to be measured placed at one part of cylinder that separated to measure the moving forth-back of inside pushing stick by distance meter unit at least two units. Then, the units calculates the changed distances in cylinder as data for finding volume and density and air pressure inside cylinder at least one cylinder and to be sent to pressure and vacuum meter and displays in numbers or signs to show pressure inside cylinder as support data in calculation of volume and density of the object needed to be measured.