In a brake pedal device 1 of a vehicle, including a pedal retreat suppression mechanism for turning a pedal arm 2 to the vehicle front in association with the operation of a dash panel 7 moving to the vehicle rear on receipt of a shock load applied from the vehicle front, the pedal retreat suppression mechanism includes a link mechanism 16 and a trigger 15 attached turnably to a pedal bracket 8 so that a second link 19 of the link mechanism 16 is disengaged from a pedal shaft 3 by the trigger 15 moving to the vehicle rear on receipt of a shock load applied from the vehicle front, an intermediate portion of a first link 18 of the link mechanism 16 is pivotally supported on the pedal arm 2, and a push rod 9a is connected to the lower end portion of the first link 18.