The electronic endoscope device in accordance with the present invention comprises an image pick-up unit capable of acquiring an object image with respect to illumination light employed for illuminating the object for each prescribed wavelength band, an exposure period setting circuit for setting the exposure period of the image pick-up unit corresponding to the each wavelength band, an amplification circuit for amplifying picked-up image signals of the object image obtained with the image pick-up unit corresponding to the each wavelength band, and a control circuit for controlling the amplification circuit such that the picked-up image signals corresponded to the each wavelength band of the object image that are acquired with the image pick-up unit at the exposure period set corresponding to the each wavelength band set by the exposure period setting circuit are amplified at amplification factors computed corresponding to the exposure period that is set corresponding to the each wavelength band.