An electrophotographic photosensitive member wherein a charge generating layer of the electrophotographic photosensitive member includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 2.0% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and a charge transporting layer of the electrophotographic photosensitive member includes a polycarbonate resin having structural units represented by formulae (1) and (2). ##STR00001##

An electrophotographic photoreceptor includes a single layer type photosensitive layer which includes a binder resin, a charge generating material, a hole transport material, a first electron transport material represented by the formula (1), and a second electron transport material represented by the formula (2), ##STR00001##
wherein X.sup.1 represents an oxygen atom or C(CN).sub.2; R.sup.11 to R.sup.17 independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group; and R.sup.18 represents an alkyl group, -L.sup.111-OR.sup.112, an aryl group, or an aralkyl group; provided that L.sup.111 represents an alkylene group, and R.sup.112 represents an alkyl group, ##STR00002##
wherein X.sup.2 represents an oxygen atom or C(CN).sub.2; R.sup.21 to R.sup.27 independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group or an aralkyl group; and R.sup.28 represents an alkylene group having 4 to 20 carbon atoms or the like.

The present invention provides an electrophotographic photosensitive member which includes an undercoat layer, and the undercoat layer contains metal oxide particles and a compound represented by the formula (1). ##STR00001##

A photosensitive layer includes a gallium phthalocyanine crystal and 0.2% by mass or more and 20% by mass or less of an arene compound based on the gallium phthalocyanine crystal, and the arene compound has a halogen atom or a halogen-substituted alkyl group, and a sulfonic acid group or a sulfonic acid salt group, as a substituent.

An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer provided on the conductive substrate, a charge generation layer provided on the undercoat layer, a charge transport layer provided on the charge generation layer, and a surface organic protective layer provided on the charge transport layer, in which the charge transport layer has a Young's modulus of 5,500 MPa or greater.