This viscosity and elasticity measuring device comprises: a rotor of which part or all is configured from an electrically conductive material, and which includes, at the center of rotation in a lower portion thereof, a protruding protuberance; a sample container into which a substance of detection, of which the viscosity is to be detected, is introduced, and in which the rotor is disposed in a state in which, while in contact with the substance of detection, the protuberance is in contact with an inner surface bottom portion of the sample container; a rotation control unit which applies a magnetic field to the rotor to induce an induced current, and which causes the rotor to rotate by means of a rotational torque resulting from a Lorentz interaction between the induced current and the magnetic field being applied to the rotor; a rotation detecting unit which detects the rotational speed of the rotor; and a viscosity and elasticity detecting unit which, by means of the rotational speed, detects the viscosity and the elasticity of the substance of detection in contact with the rotor. The position of the center of gravity of the rotor is closer to the protuberance than is the position of a center of buoyancy resulting from buoyancy that arises in correspondence with a part of the rotor that is submerged in the substance of detection.
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