Patent ID: 7799496

Claim:
An electrophotographic photosensitive member, comprising: a support; and a photosensitive layer formed on the support, wherein: the electrophotographic photosensitive member has a surface layer of the electrophotographic photosensitive member containing a polymer having repeating structural units each represented by the following formula (1): where R 1 represents a hydrogen atom or a methyl group, R 2 represents a single bond or a divalent group, and Rf 1 represents a monovalent group having at least one of a fluoroalkyl group and a fluoroalkylene group; and wherein 70 to 100% by number of the repeating structural units each represented by the formula (1) in the polymer represented by at least one of the following formulae (1-2) to (1-5): where R 1 represents a hydrogen atom or a methyl group, R 20 represents a single bond or an alkylene group, R 21 represents an alkylene group having a branched structure with a carbon-carbon bond, R 22 represents a —R 21 — group or a —O—R 21 — group, R 23 represents a —Ar— group, a —O—Ar— group, or a —O—Ar—R— group where Ar represents an arylene group and R represents an alkylene group, Rf 10 represents a monovalent group having at least a fluoroalkyl group, and Rf 12 represents a fluoroalkyl group interrupted with oxygen.