A scanning endoscope includes: an optical fiber that emits an illuminating light from a distal end an actuator that causes a distal end of the optical fiber to oscillate a fixing block that fixes the optical fiber and a propagation portion that is provided in close contact with an outer circumferential face of a cladding of the optical fiber at a position on the distal end side relative to the fixing block, and on which, among the illuminating light, light that reaches the outer circumferential face of the cladding is incident and is propagated or absorbed inside the propagation portion.
