Abstract: A contact image sensor module comprising a plurality of blocks for transforming light being incident upon into image data, the block having a plurality of unit cells, the unit cell including a light-electro transducer and a switching element, a plurality of common lines for providing a driving voltage for the light-electro transducers having a first predetermined value and a driving voltage for the switching elements having a second predetermined value, each common line of the plurality of common lines is connected to a gate (driving part) of a corresponding unit cell and a light-electro transducer of a preceding unit cell in every block, a driving circuit for providing, in consecutive order, to each common line the driving voltage for the switching element for a predetermined time period while providing the driving voltage for the light-electro transducer to the plurality of common lines except the common line being provided with the voltage for the switching element, whereby switching elements of correspond