An electric bicycle configured to generate electricity by pedals thereof, the electric bicycle includes a front frame provided with a front wheel and a handle; a center frame provided with pedals and a saddle, a rear frame provided with a rear wheel; a pedal housing provided at the a front frame provided with a front wheel and a handle, a center frame provided with pedals and a saddle, a rear frame provided with a rear wheel, a pedal housing provided at the center frame, a pedal shaft provided with the pedals at both end portions thereof while passing through the pedal housing, an accelerating unit allowing the pedal shaft to pass therethrough and provided with an input side directly connected to the pedal shaft to increase rotational speed, and a generating unit allowing the pedal shaft to pass therethrough and directly connected to an output side of the accelerating unit.