An imaging system (1) has an illumination light source section (10) for emitting illumination light having a near infrared wavelength, an illumination optical system (20) for applying the illumination light emitted from the illumination light source section (10) to an observation object (90), an imaging optical system (30) for guiding as object light the illumination light emitted from the illumination optical system (20) to the observation object (90) and scattered, reflected or refracted by the object (90), and an imaging section (40) for imaging the observation object (90) by receiving theobject light guided by the imaging optical system (30). The imaging section (40) receives the object light traveled through water and hemoglobin.