Electrophotographic photosensitive member with disazo or trisazo compound

An electrophotographic photosensitive member comprising (i) a charge generation layer comprising an azo pigment represented by the following formula (I):

• ##STR127## in the formula, Cp is a coupler residue;
• A.sub.1 and A.sub.2 are each a divalent organic residue;
• n is 0 or 1;
• and
• when n is 0, A.sub.3 is substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or --(CH.dbd.CH).sub.l --R', wherein R' is a substituted or unsubstituted heterocyclic ring residue and l is 0, 1 or 2, and when n is 1, A.sub.3 is a divalent organic residue and (ii) a charge transport layer.

An electrophotographic photosensitive member comprising a photosensitive layer comprising (i) at least one azo pigment represented by the following formula (I):

• ##STR128## in the formula, Cp is a coupler residue;
• A.sub.1 and A.sub.2 are each a divalent organic residue;
• n is 0 or 1;
• and
• wherein R' is a substituted or unsubstituted heterocyclic ring residue and l is 0, 1 or 2, and when n is 1, A.sub.3 is a divalent organic residue.