Patent ID: 8628854

Claim:
An electro-conductive member for electrophotography, comprising: an electro-conductive mandrel; and an electro-conductive layer provided on a periphery thereof, wherein the electro-conductive layer contains a binder resin having, in a molecule thereof, an alkylene oxide structure, and a sulfo group or a quaternary ammonium group as an ion exchange group, and an ion having polarity opposite to polarity of the ion exchange group, a water content of the electro-conductive layer under an environment of a temperature of 30° C. and a relative humidity of 80% is 10 mass % or less, and a spin-spin relaxation time T 2 of the electro-conductive layer, which is determined by pulse NMR measurement with a hydrogen core being a measurement core under an environment of a temperature of 15° C. and a relative humidity of 10%, is 200 μsec or more.