An organ type electronic brake pedal apparatus having a high- load spring module and a hysteresis module is capable of tuning a pedal effort, a stroke and a hysteresis operation force, desired differently for each vehicle model, by changing a component of the high-load spring module or hysteresis module. In particular, the organ type electronic brake pedal apparatus includes: a pedal housing to be fixedly installed on a floor below a driver seat of a vehicle; a pedal pad pivotably coupled to the pedal housing to be operated by a driver of the vehicle; a high-load spring module including a first end and a second end pivotably coupled to the pedal housing and the pedal pad, respectively; and a hysteresis module to connect the pedal housing and the pedal pad and generate hysteresis when the pedal pad is operated by the driver.