Patent ID: 7534534

Claim:
A cylindrical electrophotographic photosensitive member comprising: a cylindrical support and an organic photosensitive layer provided on the cylindrical support, wherein a peripheral surface of the electrophotographic photosensitive member has a plurality of dimple-shaped concavities, a 10-point average roughness Rzjis (A) as measured along the circumference of the peripheral surface of the electrophotographic photosensitive member is 0.3 to 2.5 um, a 10-point average roughness Rzjis (B) as measured along the generating line of the peripheral surface of the electrophotographic photosensitive member is 0.3 to 2.5 um, a mean spacing of profile irregularities, RSm (C), as measured along the circumference of the peripheral surface of the electrophotographic photosensitive member is 5 to 120 um, a mean spacing of profile irregularities, RSm (D), as measured along the generating line of the electrophotographic photosensitive member is 5 to 120 um, and the value of a ratio (D/C) of the mean spacing of profile irregularities RSm (D) to the mean spacing of profile irregularities RSm (C) is 0.5 to 1.5, and wherein among said dimple-shaped cancavities, the number of dimple-shaped concavities of which the maximum diameter is in the range of 1 to 50 um and the depth is in the range of 0.1 to 2.5 um is 5 to 50 per 10,000 um 2 of peripheral surface of said electrophotographic photosensitive member.