The present invention provides an electronic endoscope which enables the image pickup apparatus of the electronic endoscope to be easily replaced with image pickup apparatuses of different specifications. The electronic endoscope according to the present invention is configured by including a distal end member which is provided at a distal end portion of an insertion portion of the electronic endoscope, and which includes an image pickup apparatus mounting hole as a housing portion for housing an image pickup apparatus; and an outer shape adjusting member as an adjusting member which is provided between the image pickup apparatus and the image pickup apparatus mounting hole, and which fixes the image pickup apparatus in the image pickup apparatus mounting hole.