Photosensitive medium for electrophotography having a cyanine photoconductive pigment

A photosensitive medium for electrography which comprises an electrically conductive support having thereon a photoconductive layer consisting essentially of a non-photoconductive binder and a cyanine pigment which functions as a photoconductor and which comprises particles having a size below about 5 microns but larger than molecular size expressed by the following general formula (I) ##STR12## in which A represents ##STR13## wherein B represents an aromatic group, a halogen atom, a nitro group, a cyano group, an acetoxy group, a styryl group, an alkylthio group, an alkoxy group, ##STR14## in which Z represents --O--, --Se--, ##STR15## or --S--, R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents an alkyl group or an allyl group, Y represents --S--, --Se--, --O--, ##STR16## X represents an anion, and the moiety in the above formula (I) can optionally represents a benzene ring fused to the terminal benzene ring.