Shutter device for a front grille of a vehicle, comprising - a structure, - at least two flaps (30, 31, 40, 41) coupled in a pivoting manner to said structure and adapted for pivoting between an airflow blocking position and an open position, - an actuator, and - a transmission mechanism (6, 6') coupled to the actuator and adapted for transmitting the movement of the actuator to the flaps (30, 31, 40, 41) to carry out a sequential opening of said at least two flaps (30, 31, 40, 41), the transmission mechanism (6, 6') comprising one gear (60, 60') for each one of said at least two flaps (30, 31, 40, 41), characterized in that each gear (60, 60') comprises ∘ a drive wheel (61, 61') coupled to the actuator and comprising a notched part (610, 610') and a blocking part (611, 611'), and ∘ a driven wheel (62, 62') coupled to the corresponding flap (30, 40) and comprising a notched part (620, 620') and a blocking part (621, 621'), ▪ the notched parts (610, 610', 620, 620') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted for engaging one another such that the driven wheel (62, 62') can transmit the movement of the actuator to the respective flap (30, 40), and ▪ the blocking parts (611, 611', 621, 621') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted so that the driven wheel (62, 62') is blocked by the drive wheel (61, 61') when said blocking parts (611, 611', 621, 621') interlock with one another, the notched parts (610, 610', 620, 620') and the blocking parts (611, 611', 621, 621') of each gear (60, 60') being distributed differently with respect to the movement of the actuator for the sequential opening of said at least two flaps (30, 31, 40, 41). - a structure, - at least two flaps (30, 31, 40, 41) coupled in a pivoting manner to said structure and adapted for pivoting between an airflow blocking position and an open position, - an actuator, and - a transmission mechanism (6, 6') coupled to the actuator and adapted for transmitting the movement of the actuator to the flaps (30, 31, 40, 41) to carry out a sequential opening of said at least two flaps (30, 31, 40, 41), the transmission mechanism (6, 6') comprising one gear (60, 60') for each one of said at least two flaps (30, 31, 40, 41), characterized in that each gear (60, 60') comprises ∘ a drive wheel (61, 61') coupled to the actuator and comprising a notched part (610, 610') and a blocking part (611, 611'), and ∘ a driven wheel (62, 62') coupled to the corresponding flap (30, 40) and comprising a notched part (620, 620') and a blocking part (621, 621'), ▪ the notched parts (610, 610', 620, 620') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted for engaging one another such that the driven wheel (62, 62') can transmit the movement of the actuator to the respective flap (30, 40), and ▪ the blocking parts (611, 611', 621, 621') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted so that the driven wheel (62, 62') is blocked by the drive wheel (61, 61') when said blocking parts (611, 611', 621, 621') interlock with one another, the notched parts (610, 610', 620, 620') and the blocking parts (611, 611', 621, 621') of each gear (60, 60') being distributed differently with respect to the movement of the actuator for the sequential opening of said at least two flaps (30, 31, 40, 41). ∘ a drive wheel (61, 61') coupled to the actuator and comprising a notched part (610, 610') and a blocking part (611, 611'), and ∘ a driven wheel (62, 62') coupled to the corresponding flap (30, 40) and comprising a notched part (620, 620') and a blocking part (621, 621'), ▪ the notched parts (610, 610', 620, 620') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted for engaging one another such that the driven wheel (62, 62') can transmit the movement of the actuator to the respective flap (30, 40), and ▪ the blocking parts (611, 611', 621, 621') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted so that the driven wheel (62, 62') is blocked by the drive wheel (61, 61') when said blocking parts (611, 611', 621, 621') interlock with one another, ▪ the notched parts (610, 610', 620, 620') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted for engaging one another such that the driven wheel (62, 62') can transmit the movement of the actuator to the respective flap (30, 40), and ▪ the blocking parts (611, 611', 621, 621') of the drive wheel (61, 61') and the driven wheel (62, 62') being adapted so that the driven wheel (62, 62') is blocked by the drive wheel (61, 61') when said blocking parts (611, 611', 621, 621') interlock with one another,