An apparatus for reducing an effort of a clutch pedal for a vehicle may include a hinge pipe provided in an upper portion of a pedal arm so that a pedal hinge penetrates the hinge pipe and having a plurality of pipe protrusions which protrude in a radial direction along a circumferential direction of the hinge pipe on an outer peripheral surface of the hinge pipe, a spring housing fixedly installed on an inside of a pedal member facing the hinge pipe, and a leaf spring positioned in an inner space of the spring housing and fixedly installed in the spring housing to be flexibly bent and having a curve portion contacting one or each of the pipe protrusions.