A vibration-type gyro apparatus is disclosed, which includes a vibration mass portion, a piezo-electric element for detecting the displacement of the apparatus and a preamplifier having an input resistance R and supplied with the output from the piezo-electric element, wherein the input resistance R is selected to have a value substantially expressed as R APPROX 1/C omega (where C is an electrostatic capacity of the piezo-electric element and omega is a vibration angular velocity of the mass portion) so that the gyro apparatus will be substantially free of variations due to temperature changes.
