Patent ID: 7604913

Claim:
An electrophotographic photoreceptor comprising: an electroconductive substrate; and a photosensitive layer provided on the electroconductive substrate; wherein the photosensitive layer comprises an organic pigment and a polyester resin containing the repeating unit represented by the following formula 5: wherein a ratio of a/(a+b) is greater than 0.7, A is a compound having a structure represented by the following formula (A) wherein each of Ra 1 and Ra 2 independently represents a hydrogen atom or a monovalent substituent which may have a substituent, and each of n and m is independently an integer from 0 to 4, F is a compound having a structure represented by the following formula (F): wherein X 2 represents one selected from the group consisting of a single bond and a bivalent group, and said bivalent group is one selected from the group consisting of a sulfur atom, an oxygen atom, a sulfonyl group, a cycloalkylene group, and —CR 19 R 20 —, each of R 7 and R 8 independently represents one selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a halogen group, and an alkoxy group, and each of k and l independently represents an integer from 1 to 4, wherein each of R 19 and R 20 independently represents one selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a halogen and an alkoxy group, G is a compound having a structure represented by the following formula (G.): wherein X 3 represents a bivalent group.