ELECTROPHOTOGRAPHIC SENSITIVE BODY

PURPOSE:To obtain an electrophotographic sensitive body superior in sensitivity and durability, above all, small in accumulation of residual potential, and high in performance by incorporating a specified vinyl acetal copolymer comprising different acetals in an electric charge generating layer. CONSTITUTION:At least the charge generating layer and a charge transfer layer are formed on a conductive substrate and the charge generating layer contains at least the vinyl acetal copolymer having structural units represented by formulae I, II, and III in which R is a 1 - 7 C saturated or unsaturated aliphatic hydrocarbon group; R is an aromatic hydrocarbon group; and p is 0, 1, or 2, thus permitting the obtained electrophotographic sensitive body to be high insensitivity and not to tend to cause accumulation of residual potential under high temperature and high humidity accordingly good in environmental resistance.