A dental probe (10) according to the invention is provided with a tip portion (11) including a water flow path (31), an air flow path (32), a multi-lumen tube 30 including a duct (33) formed therein in which an optical fiber (20) is inserted, and the optical fiber (20) inserted in the duct (33). The optical fiber (20) includes a resin-coated layer (23) provided on an outer circumference of a cladding (22) and a metal-coated layer (24) provided on the outer circumference of the resin-coated layer (23), and the resin-coated layer (23) is formed of a polymer compound having a refractive index lower than that of the cladding (22).
