An endoscope apparatus according to this invention has a connector portion to which an endoscope having a CCD can be connected, a light source device having a light source portion which applies illumination light to an object to be observed by the CCD, an illumination time variator unit which changes an illumination time for illumination light from the light source portion, a storage portion provided in the endoscope and storing illumination time information for illumination light suitable for the endoscope, and a utilization factor controlling portion which, upon connection of the endoscope, reads out the illumination time information stored in the storage portion and controls the illumination time variator unit such that the illumination time for the light source portion is consistent with the read-out illumination time information.
