In a light irradiation apparatus, an elongated body 20 has flexibility that allows for elastic restoration. An LED chip 10 is closely fixed to a tip portion 22 of the elongated body 20 and emits ultraviolet light. A cover unit 12 covers the LED chip 10 so as to protect the LED chip 10 and allows the ultraviolet light emitted by the LED chip 10 to pass therethrough. A conductive unit 24 extends in a longitudinal direction of the elongated body 20 and passes electric current for allowing the LED chip 10 to emit light. An insulation unit 26 covers the conductive unit 24 so as to ensure electrical insulation of the conductive unit 24. A bending mechanism may be further provided that is provided near the tip portion 22 and that allows a vicinity of the tip portion 22 to be bent. A control unit may be further provided that allows a bending direction by the bending mechanism to be controlled from an end portion on the side opposite to the tip portion 22 in the elongated body 20.
