Archem Inc.

Bridgestone Corporation

Kaori Okumoto

Makoto Otsuru

Akihide Osaku

Provided is a charging roller that can achieve excellent image quality and prevent detachment of particles in its surface layer. A charging rollercomprises a shaftand, on an outer circumferential side of the shaft, at least a base layerand a surface layer, wherein the surface layercontains a binder resinand particles, and the particlescontain 50 mass % or more of a same component A as at least one selected from components constituting the binder resin, and a content of the particles in the surface layer is 30 parts to 120 parts by mass with respect to 100 parts by mass of the binder resin.

Charging roller and image forming apparatus

A charging roller comprises a shaft member, a base layer located outside in the radial direction of the shaft member, and a surface layer located outside in the radial direction of the base layer and forming a surface. The surface layer includes particles, and the ratio of the total area of the particles exposed from the surface of the surface layer in a planar view seen from the radial direction of the charging roller, with respect to the area of the surface of the surface layer is more than 60%.

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Tokyo, Japan

Kaori Okumoto