Electrophotographic photosensitive member and image forming apparatus including electrophotographic photosensitive member

An image forming apparatus comprising:

• an image-supporting member;
• a charging device for charging a surface of the image-supporting member;
• an exposing device for exposing the charged surface of the image-supporting member and forming an electrostatic latent image on the surface of the image-supporting member;
• a developing device for developing the electrostatic latent image on the surface of the image-supporting member to form a toner image;
• and
• a transferring device for transferring the toner image from the image-supporting member to a transfer-receiving medium,
• the image-supporting member is a single-layer-type electrophotographic photosensitive member comprising a layer disposed on an electrically conductive substrate, the layer including at least a charge-generating material, an electron transport material, a hole transport material, and a binder resin within the same layer;
• and
• the charge-generating material contains a phthalocyanine pigment and N-type pigments including at least a perylene-based pigment and an azo-based pigment, and the total amount of the N-type pigments is 0.3 to 3 parts by mass relative to 1 part by mass of the phthalocyanine pigment, and the charging device positively charges the image-supporting member.