A vibratory gyroscope sensor comprising: - a base , - a resonator that includes a central foot by which the resonator is attached to said base and a sidewall that rises from said foot up to a free end edge delimiting an opening, said sidewall comprising a proximal portion that rises from and around said foot as well as a distal portion generally cylindrical in shape that extends in line with said proximal portion up to said free end edge , said proximal portion progressively widening from the foot towards the distal portion , the sensor being characterized in that said proximal portion includes a plurality of arms separated from each other by clear spaces and arranged equiangularly around said foot , each of said arms extending longitudinally between a central end arranged on the side of the foot and a peripheral end arranged on the side of the distal portion , said sensor comprising a plurality of excitation devices attached to said proximal portion to excite said resonator into vibration, as well as a plurality of detection devices attached to said proximal portion to detect vibrations of said resonator , said excitation devices and said detection devices being attached to said arms . - a base , - a resonator that includes a central foot by which the resonator is attached to said base and a sidewall that rises from said foot up to a free end edge delimiting an opening, said sidewall comprising a proximal portion that rises from and around said foot as well as a distal portion generally cylindrical in shape that extends in line with said proximal portion up to said free end edge , said proximal portion progressively widening from the foot towards the distal portion , the sensor being characterized in that said proximal portion includes a plurality of arms separated from each other by clear spaces and arranged equiangularly around said foot , each of said arms extending longitudinally between a central end arranged on the side of the foot and a peripheral end arranged on the side of the distal portion , said sensor comprising a plurality of excitation devices attached to said proximal portion to excite said resonator into vibration, as well as a plurality of detection devices attached to said proximal portion to detect vibrations of said resonator , said excitation devices and said detection devices being attached to said arms . said sidewall comprising a proximal portion that rises from and around said foot as well as a distal portion generally cylindrical in shape that extends in line with said proximal portion up to said free end edge , said proximal portion progressively widening from the foot towards the distal portion , the sensor being characterized in that said proximal portion includes a plurality of arms separated from each other by clear spaces and arranged equiangularly around said foot , each of said arms extending longitudinally between a central end arranged on the side of the foot and a peripheral end arranged on the side of the distal portion , said sensor comprising a plurality of excitation devices attached to said proximal portion to excite said resonator into vibration, as well as a plurality of detection devices attached to said proximal portion to detect vibrations of said resonator , said excitation devices and said detection devices being attached to said arms . <EOS>