Accelerator pedal device for a vehicle

An accelerator pedal device comprising:

• a belt fastening detector configured to detect fastening and unfastening states of a seat belt;
• and
• a pedal reactive force enhancer configured to enhance reactive force against treading pressure on an accelerator pedal when an ignition switch is on while the seat belt is unfastened, based on a detecting operation of the belt fastening detector,
• wherein the pedal reactive force enhancer comprises a spring tension enhancing mechanism configured to enhance tension of a return spring being mounted to be connected between a pedal arm and a pedal support member to retain the pedal arm in an initial position,
• wherein the spring tension enhancing mechanism includes:
• a lever being rotatably and pivotally supported on the pedal support member, on a lower end of which one end of the return spring is hooked;
• and
• an actuator being operated based on the detecting operation of the belt fastening detector so as to push an upper end of the lever and to enhance the tension of the return spring.