An endoscope system includes, an inserting section having an insertion axis, an imaging section which takes an image of a specimen on a lateral side to the insertion axis, an image generating section which generates a picture image of the specimen on the basis of an imaging signal output by the imaging section, an operating section which is provided on a proximal end side of the inserting section, and operated by an operator, a gravity direction indicating section which is provided on the lateral side of the operating section, and used by the operator to indicate a gravity direction, and a processing section which rotates the picture image of the specimen in correspondence with an indication of the gravity direction indicating section.
