A drum pedal has a base, a pivoting assembly, a rotating element, a beater holder assembly, a chain assembly, and a foot board. The pivoting assembly is mounted in the base. The rotating element, the beater holder assembly and the chain assembly are mounted in the pivoting assembly. The foot board is mounted between the chain assembly and the base. The base has a resilient element mounted concentric with a shaft of the pivoting assembly. A rotating element receives the resilient element. A torque of the resilient element is evenly matched with a swing caused by the beater holder and the chain assembly. Therefore, the beater holder and the chain assembly return to the original position immediately after the swing. Two drum pedals are manipulated to play respectively, and are connected by a coupling assembly to compose a drum pedal unit.