A device for mounting a pedal of a vehicle including a support on which the pedal is mounted by a principal rotary shaft and a shearing mechanism connected to a fixed bodywork element of the vehicle, the shearing mechanism configured to radially shear off the principal shaft in a case of a displacement of the support relative to the bodywork element, to detach the pedal from the support. A secondary shaft is fixed to the pedal and is configured to position the pedal, which has been sheared off, in a new operating position.