CHARGING ROLL, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

Provided is a charging roll, including a core body, and an elastic layer that is disposed on an outer circumferential surface of the core body, wherein, with respect to an approximation curve that extends an outer curve of the axial direction of the core body of an outer circumferential surface in a region other than both end portions of the outermost layer up to both end portions of the outermost layer, a maximum increase amount of the outer curve in both end portions of the outermost layer is equal to or less than 60 μm, and wherein a coefficient of friction of the outer circumferential surface at a position showing the maximum increase amount of the outer curve in both end portions of the outermost layer is equal to or less than 0.3, and a variation amount of the coefficient of friction is equal to or less than 30%.