The pedal of bicycle includes a frame and a cushion pad. The frame includes a frame portion enclosing at least one hollow portion. The frame portion has a first face and a second face. The hollow portion penetrates the first face and the second face. A portion of the first face most remote from the second face defines a first imaginary plane, and a portion of the second face most remote from the first face defines a second imaginary plane. The cushion pad is made of elastic material and is embedded in the hollow portion. The cushion pad has a third face and a fourth face. The third face corresponds to the first face, and the fourth face corresponds to the second face. The third face is protruded above the first imaginary plane, and the fourth face is protruded above the second imaginary plane normally.