Electrophotographic photoreceptor

An electrophotographic photoreceptor which comprises an electroconductive support having formed thereon a photosensitive layer comprising as essential components a charge-generating material and at least one diaminodiphenyl compound represented by the general formula (I):

• ##STR8## wherein the two R.sub.1 groups may be the same as or different from each other and each is a halogen atom, an alkyl group, an alkoxy group, an aralkyl group, a phenyl group or a phenyl group substituted by a lower alkyl or alkoxy group having 1 to 5 carbon atoms;
• the two R.sub.2 groups may be the same as or different from each other and each is a halogen atom, an alkyl group, an alkoxy group, an aralkyl group, a cycloalkyl group, a phenyl group or a phenyl group substituted by a lower alkyl or alkoxy group having 1 to 5 carbon atoms;
• the two R.sub.3 groups may be the same as or different from each other and each is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group or an aralkyl group;
• the two R.sub.4 groups may be the same as or different from each other and each is a hydrogen atom, a chlorine atom, a methyl group or a methoxy group;
• and R.sub.1 and R.sub.2 are different from each other.