<；P>；PROBLEM TO BE SOLVED: To provide an irradiating head for optical fibers with which the damage to the optical fiber is prevented and stable laser irradiation is made possible. <；P>；SOLUTION: A ferrule (3) with which the optical fiber (2) is fixed is made to be slidable and rotatable in the peripheral direction of a cylindrical housing (5) along the inner peripheral surface (5b) of the cylindrical housing (5) and to be also slidable in the axial direction of the cylindrical housing (5). <；P>；COPYRIGHT: (C)2008,JPO&INPIT
