An apparatus for reducing an effort of a clutch pedal for a vehicle may include a pedal member through both sides of which a guide slot that may be extended frontwardly and then rearwardly may be formed integrally to pass the both sides, a pedal arm lever provided at an upper part of a pedal arm so as to be protruded towards the guide slot, a guide bar engaged to the pedal arm lever and passing through the guide slot, wherein the guide bar is movable along the guide slot when the pedal arm pivots, and an elastic member, a first end of which is connected to the pedal member, and a second end of which is connected to the guide bar, such that a turnover force is generated thereto when the pedal arm pivots forwardly and a recovery force is generated thereto when the pedal arm pivots rearwardly.