A brake pedal apparatus including: an operating pedal; and first and second working levers which are pivotable according to respective different lever-ratio characteristics in response to a depressing operation effected on the operating pedal and which are connectable to a pivot member via a clutch member. When a reaction force of an output member does not exceed a switching load, a load reaction lever is held in a reference position whereby the first working lever is connected to the pivot member. When the reaction force exceeds the switching load, the load reaction lever is pivoted to a switching position against a biasing force of a biaser whereby the second working lever is connected to the pivot member.