A bicycle pedal with cadence sensor is disclosed and comprises a pedal shaft, a frame, and a cadence sensor. The pedal shaft is fastened at a crank of a bicycle. The frame is pivotably installed at the pedal shaft. The cadence sensor is arranged at the frame and the cadence sensor includes a G-sensor and a power supply coupled to the G-sensor. The cadence sensor is arranged at the frame. The cadence sensor is cooperating with the frame and the cadence information may be gained through the G-sensor. The cadence information may be transmitted to a bicycle computer or a smart mobile device. A cadence data may be resulted by program operation. The cadence data may be provided to analyze and apply.