An endoscope apparatus includes an endoscope apparatus body portion which includes a first connector, and which is connectable to an insertion portion having an image pickup device disposed at a distal end portion. The endoscope apparatus further includes a connection unit which includes a second connector which is removably connectable to the endoscope apparatus body portion by communicating the second connector with the first connector, a non-volatile memory which stores a program for processing image data inputted from the image pickup device via the second connector, a CPU which controls the processing of the image data in accordance with the stored program to produce processed data, and a display data output section configured to output the processed data.
