An endoscope system includes: an endoscope that includes a light guiding member that guides an illuminating light that is emitted from a light source, an optical system that irradiates the illuminating light that is guided by the light guiding member onto an object, and a drive portion that rocks the light guiding member so that an irradiation position of the illuminating light that is irradiated onto the object through the optical system is an irradiation position along a predetermined scanning pattern a coordinate information acquisition portion that acquires coordinate information that can identify an irradiation position of the illuminating light that is irradiated along the predetermined scanning pattern and a correction information acquisition portion that acquires correction information for correcting, based on light of a predetermined wavelength band included in the illuminating light as a reference, chromatic aberration of magnification of light of another wavelength band than the predetermined wavelength band included in the illuminating light, by performing processing based on the coordinate information.
