An electronic endoscope apparatus includes a scope unit in which a color filter is provided. The scope unit further includes a filter information storage means for storing filter information showing the kind of the color filter provided in the scope unit. Further, a plurality of kinds of scope units, each of which has filter information showing a different kind of color filter from each other, can be selectively connected. The filter information stored in the filter storage means of the connected scope unit is obtained. Then, color space correction processing is performed, based on the filter information, on color image signals output from the plurality of kinds of scope units so that each of signals for display, produced from the color image signals, represents the same point in color space.