Method for calibrating a gyrometer equipping a vehicle, the method being characterised in that it comprises the steps of: (a) Acquisition - by the gyrometer, of a measured angular velocity of the vehicle, and - by first means for measuring at least one first quantity representative of the angular velocity of the vehicle, of measured values of said at least one first quantity representative of the angular velocity of the vehicle; - by second means for measuring at least one second quantity representative of the angular velocity of the vehicle, different from said at least one first quantity representative of the angular velocity of the vehicle of measured values of said at least one second quantity representative of the angular velocity of the vehicle; (b) Determination by data processing means of values of at least one parameter for calibrating the gyrometer minimising a difference between a first estimated angular velocity of the vehicle and a second estimated angular velocity of the vehicle, - the first estimated angular velocity of the vehicle being a function of the measured angular velocity and parameters for calibrating the gyrometer, and - the second estimated angular velocity of the vehicle being a function of the measured values of said at least one first quantity representative of the angular velocity of the vehicle; (c) Estimation of a parameter representative of an error on the calibration parameter(s) and, if said parameter representative of an error on the calibration parameter(s) is below a predetermined threshold, the actual calibration of the gyrometer and if appropriate of the means for measuring at least one first quantity representative of the angular velocity of the vehicle, as a function of the determined values of the calibration parameters and, if said parameter representative of an error on the calibration parameter(s) is above said predetermined threshold, the determined values of the calibration parameter(s) are not accepted, the parameter representative of an error on the calibration parameter(s) resulting from a comparison between the second estimated angular velocity and a reference angular velocity of the vehicle depending on the measured values of said at least one second quantity representative of the angular velocity of the vehicle. (a) Acquisition - by the gyrometer, of a measured angular velocity of the vehicle, and - by first means for measuring at least one first quantity representative of the angular velocity of the vehicle, of measured values of said at least one first quantity representative of the angular velocity of the vehicle; - by second means for measuring at least one second quantity representative of the angular velocity of the vehicle, different from said at least one first quantity representative of the angular velocity of the vehicle of measured values of said at least one second quantity representative of the angular velocity of the vehicle; - by the gyrometer, of a measured angular velocity of the vehicle, and - by first means for measuring at least one first quantity representative of the angular velocity of the vehicle, of measured values of said at least one first quantity representative of the angular velocity of the vehicle; - by second means for measuring at least one second quantity representative of the angular velocity of the vehicle, different from said at least one first quantity representative of the angular velocity of the vehicle of measured values of said at least one second quantity representative of the angular velocity of the vehicle; (b) Determination by data processing means of values of at least one parameter for calibrating the gyrometer minimising a difference between a first estimated angular velocity of the vehicle and a second estimated angular velocity of the vehicle, - the first estimated angular velocity of the vehicle being a function of the measured angular velocity and parameters for calibrating the gyrometer, and - the second estimated angular velocity of the vehicle being a function of the measured values of said at least one first quantity representative of the angular velocity of the vehicle; - the first estimated angular velocity of the vehicle being a function of the measured angular velocity and parameters for calibrating the gyrometer, and - the second estimated angular velocity of the vehicle being a function of the measured values of said at least one first quantity representative of the angular velocity of the vehicle; (c) Estimation of a parameter representative of an error on the calibration parameter(s) and, if said parameter representative of an error on the calibration parameter(s) is below a predetermined threshold, the actual calibration of the gyrometer and if appropriate of the means for measuring at least one first quantity representative of the angular velocity of the vehicle, as a function of the determined values of the calibration parameters and, if said parameter representative of an error on the calibration parameter(s) is above said predetermined threshold, the determined values of the calibration parameter(s) are not accepted, the parameter representative of an error on the calibration parameter(s) resulting from a comparison between the second estimated angular velocity and a reference angular velocity of the vehicle depending on the measured values of said at least one second quantity representative of the angular velocity of the vehicle.