To provide a wet developing electrophotographic photoreceptor having prescribed sensitivity over a long period of time and superior in durability and solvent resistance, and also to provide a wet developing image forming apparatus.

The wet developing electrophotographic photoreceptor is provided with a photoreceptor layer on a conductive base substance, and the wet developing image forming apparatus is provided with the wet developing electrophotographic photoreceptor. The photoreceptor layer contains a stilbene derivative having four triphenylamine structures expressed by the formula (1) (herein, A is a quadrivalent organic group containing a substitution or non-substitution aromatic ring, a plurality of R1 to R9, and B1 and B2 are independently hydrogen atoms, a substitution or non-substitution alkyl group or the like of 1-20 carbon number and a repeating number m is an integer of 0-2) as a hole transport agent.