Present disclosure provides an insert that is at least partially inserted into a subject, the insert includes: a first light guide member that guides light with a first wavelength a first light emitting portion from which the light guided by the first light guide member is emitted a second light guide member that is provided so as to be adjacent to the first light guide member and guides light with a second wavelength different from the first wavelength a second light emitting portion from which the light guided by the second light guide member is emitted and a light absorption/conversion member.
