Abstract: A measuring apparatus is provided for measuring the internal friction of a transversely vibrating metal specimen at various operation temperatures. The measuring apparatus includes a container body mounted on a machine table and having an open upper end, an ascending device for moving vertically a container lid into and out of engagement with the container body, and a measuring unit secured to the lower surface of the container lid. The measuring unit includes a measuring rack, a heating body, a heating source, a temperature sensing element, a water-cooled driving member and a water-cooled detecting member. The specimen can be driven by the driving member to vibrate in the measuring unit and detected by the detecting member to allow determination of its metal properties.