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1. An electrophotographic photosensitive member comprising:
a support; a charge-generating layer formed on the support; and a charge-transporting layer formed on the charge-generating layer; wherein the charge-transporting layer is a surface layer of the electrophotographic photosensitive member, and the charge-transporting layer has a matrix-domain structure having: a domain which comprises: a compound D having a structural unit represented by the following formula (O-1) and a structural unit represented by the following formula (O-2); and at least one resin selected from the group consisting of: a resin A1 having a structural unit represented by the following formula (A-1) and a structural unit represented by the following formula (B), and a resin A2 having a structural unit represented by the following formula (A-2) and a structural unit represented by the following formula (B); and a matrix which comprises: a resin C having a structural unit represented by the following formula (C); and a charge-transporting substance; wherein a content of the structural unit represented by the formula (A-1) and the structural unit represented by the formula (A-2) is from 10% by mass to 40% by mass based on the total mass of the resin A1 and the resin A2, where, m11 represents 0 or 1, X11 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, Z11 and Z12 each independently represents an alkylene group having 1 to 4 carbon atoms, R11 to R14 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and n11 represents the repetition number of a structure within brackets, and an average of n11 in the resin A1 ranges from 20 to 150, where, m21 represents 0 or 1, X21 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, Z21 to Z23 each independently represents an alkylene group having 1 to 4 carbon atoms, R16 to R27 each independently represents an alkyl group having 1 to 4 carbon atoms, or a phenyl group, and n21, n22 and n23 each independently represents the repetition number of a structure within brackets, an average of n21 in the resin A2 ranges from 1 to 10, an average of n22 in the resin A2 ranges from 1 to 10, and an average of n23 in the resin A2 ranges from 20 to 200, where, m31 represents 0 or 1, X31 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, Y31 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and R31 to R38 each independently represents a hydrogen atom or a methyl group, where, m41 represents 0 or 1, X41 represents an ortho-phenylene group, a meta-phenylene group, a para-phenylene group, a bivalent group having two para-phenylene groups bonded with a methylene group, or a bivalent group having two para-phenylene groups bonded with an oxygen atom, Y41 represents a single bond, a methylene group, an ethylidene group, a propylidene group, a cyclohexylidene group, a phenylmethylene group, a phenylethylidene group or an oxygen atom, and R41 to R48 each independently represents a hydrogen atom or a methyl group, where, R64 represents a hydrogen atom or a methyl group, R62 represents a phenyl group, a cyano group, a carbamoyl group, or a group represented by the formula —COOR64, where R64 represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a 2-ethylhexyl group, a nonyl group, an isononyl group, a cyclohexyl group, a 2-methoxyethyl group or a 2-hydroxyethyl group, R63 represents a hydrogen atom or a methyl group, and n61 represents the repetition number of a structure within brackets, and an average of n61 in the compound D ranges from 1 to 500.
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