Provided is a battery charger suitable for an electric pipette, improved in degree of installation freedom and expandability. A battery charger includes a pipette receiver, left and right arms extending forward from the pipette receiver, charging electrodes that come into contact with pipette side electrodes exposed to the outside of a main body of an electric pipette and charge a battery of the electric pipette, a power delivering port, and preferably, a power relay port, and a pipette receiver rear surface is formed with a vertical plane, and the vertical plane acts as a fixing part.