An organ type accelerator pedal assembly may include a pedal arm, one end of which is connected to a pedal housing fixed to a dash panel below the driver's seat to pivot around the central axis of the one end thereof, a pedal, one end of which is pivotably hinged to a pedal bracket fixed to a floor panel under the driver's seat, a pedal connection module that connects the other end of the pedal arm with the other end of the pedal by using a ball joint connection.