A lifter structure applied to an internal combustion engine and is actuated by a cam, includes a cylindrical lifter guide, a lifter body reciprocally moved in the guide while sliding on an inner circumferential surface of the guide, with drive of the cam, a pair of opposed walls continuous to an end of the lifter body, a pin extending through holes of the opposed walls and having two ends swaged onto outer surfaces of the opposed walls respectively, a roller disposed between the opposed walls, plural swaging side regions located at the same sides of the outer circumferential surface of the lifter body as the outer surfaces of the opposed walls, plural swaging side opposite regions located opposite the swaging side regions respectively, and plural escape recesses formed in the swaging side opposite regions so as to be spaced from the swaging side regions respectively.