An electronic endoscope provided with a plurality of solid-state image pickup devices is connected to the endoscope connection portion of a signal processing apparatus for an electronic endoscope. The signal processing apparatus for an electronic endoscope includes a selecting operation portion for performing the operation to generate a selecting signal to allow the selection of at least one output signal of the plurality of solid-state image pickup devices provided in the electronic endoscope connected to the endoscope connecting portion a signal processing circuit performing signal processing for the output signal of one solid-state image pickup device selected based on the selecting signal and generating a video signal, and an information switch control portion performing the switching of the information to be displayed in the display device regarding the electronic endoscope corresponding to one selected solid-state image pickup device whose output signal is selected.
