an electrophotographic photoreceptor is disclosed , comprising a conductive substrate having thereon a photosensitive layer , wherein the photosensitive layer comprises at least one compound selected from the group consisting of a compound of formula , a compound of formula , and a compound of formula as defined below : ## str1 ## wherein x i represents a cyano group , an alkoxycarbonyl group , or an aryloxycarbonyl group ; r i 1 and r i 2 each represents a hydrogen atom , an alkyl group , an aryl group , an alkoxycarbonyl group , an aryloxycarbonyl group , an alkylcarbonyl group , an arylcarbonyl group , a nitro group , a halogen atom , or a cyano group ; a i represents ## str2 ## wherein r i 3 and r i 9 each represents a hydrogen atom , an alkyl group , a nitro group , a halogen atom , or a cyano group ; and m and n each represents an integer of 0 to 3 ; ## str3 ## wherein x ii represents o , c 2 or c 2 , wherein r ii is an alkyl group ; r ii 1 and r ii 2 each represents a hydrogen atom , an alkyl group , an aryl group , an alkoxycarbonyl group , an aryloxycarbonyl group , a nitro group , a halogen atom , or a cyano group ; and m &# 39 ; and n &# 39 ; each represents an integer of 0 to 2 ; and ## str4 ## wherein r iii 1 and r iii 2 each represents a hydrogen atom , an alkyl group , an aryl group , an alkoxycarbonyl group , an aryloxycarbonyl group , an alkylcarbonyl group , an arylcarbonyl group , a nitro group , a halogen atom , or a cyano group , a iii represents ## str5 ## wherein r iii 3 and r iii 9 each represents a hydrogen atom , an alkyl group , a nitro group , a halogen atom , or a cyano group ; and m &# 34 ; and n &# 34 ; each represents an integer of 0 to 3 .