An endoscope system includes a portion configured to acquire a position of an objective optical system provided in an insertion portion of an endoscope a portion configured to position the position of the objective optical system on three-dimensional image information about a subject a portion configured to generate angle-of-view display information related to a picked-up image picked up by an image pickup system including the objective optical system an instruction portion configured to output an instruction signal and an image processing portion configured to create an overlapped image obtained by overlapping the angle-of-view display information at a position on the three-dimensional image information corresponding to the position of the objective optical system at a time point of inputting the instruction signal.
