Developer carrying member and image forming apparatus

Abstract

Provided is a developer carrying member which depends on a sheet-passing speed to a small extent while maintaining satisfactory developability, and can stably suppress a fogging amount with time. The developer carrying member includes: an electro-conductive mandrel; and an electro-conductive elastic layer, in which: the elastic layer contains a resin j, an electro-semiconductive particle p, and an electro-conductive particle c; and when an electroconductivity of the resin j is defined as σ, a dielectric constant of the resin j is defined as ∈, an electroconductivity of the electro-semiconductive particle p is defined as σand a dielectric constant of the electro-semiconductive particle p is defined as ∈, σ, ∈, σ, and ∈satisfy relationships represented by the following formulae (1) and (2), σ, ∈, σand ∈being calculated by an AC impedance method.σ<σ<0.05 S/cm  (1)∈<∈  (2)