An endoscope includes: an insertion portion a first observation portion configured to observe a first area including a front of the insertion portion a second observation portion configured to observe a second area including a side of the insertion portion and be adjacent to the first area a first illumination portion configured to irradiate the second area with first illumination light and a second illumination portion configured to irradiate the second area with second illumination light, and the second illumination portion performs irradiation with the second illumination light of a light quantity equal to a light quantity for which the first illumination light in a range observed in the second observation portion and illumination light from an illumination portion configured to irradiate the first area with the illumination light are put together.
