An electronic endoscope system as an endoscope insertion shape analysis apparatus of the invention includes: an electronic endoscope having an insertion portion to be inserted into a body cavity; a shape observation apparatus and the like for detecting a shape of the insertion portion by a plurality of source coils of the insertion portion of the endoscope, a sense coil unit, and a shape processing device; and a display for displaying an endoscope image picked up by the endoscope and the shape detected by the shape observation apparatus; and further includes a PC for classifying shape data into a pattern based on the shape detected by the shape processing device.