An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer that is provided on the conductive substrate, a charge generation layer that is provided on the undercoat layer, a charge transport layer that is provided on the charge generation layer and contains a polyester resin (1) having a dicarboxylic acid unit (A) represented by Formula (A) and a diol unit (B) represented by Formula (B) and a charge transport material, and a surface protective layer that is provided on the charge transport layer and is a cured film with a composition containing a curing agent which contains at least one of a guanamine compound or a melamine compound, and at least one reactive group-containing charge transport material having at least one substituent selected from the group consisting of OH, OCH.sub.3, NH.sub.2, SH, and COOH,

##STR00001## in Formula (A), n.sup.1 represents 1, 2, or 3, n.sup.1 pieces of m.sup.1's each independently represent 0, 1, 2, 3, or 4, m.sup.1 pieces of Ra.sup.1's each independently represent an alkyl group having 1 or more and 10 or less carbon atoms, an aryl group having 6 or more and 12 or less carbon atoms, or an alkoxy group having 1 or more and 6 or less carbon atoms, in Formula (B), Rb.sup.1 and Rb.sup.2 each independently represent a hydrogen atom, an alkyl group having 1 or more and 20 or less carbon atoms, an aryl group having 6 or more and 12 or less carbon atoms, or an aralkyl group having 7 or more and 20 or less carbon atoms, Rb.sup.3, Rb.sup.4, Rb.sup.5, Rb.sup.6, Rb.sup.7, Rb.sup.8, Rb.sup.9, and Rb.sup.10 each independently represent a hydrogen atom, an alkyl group having 1 or more and 10 or less carbon atoms, an aryl group having 6 or more and 12 or less carbon atoms, an aralkyl group having 7 or more and 20 or less carbon atoms, or an alkoxy group having 1 or more and 6 or less carbon atoms, and Rb.sup.1 and Rb.sup.2 may be bonded to each other to form a cyclic alkyl group.

An image forming apparatus includes a control unit that controls a state of a restricting unit to switch between a restricted state in which a plurality of consumable units are restricted from being removed and an unrestricted state in which the plurality of consumable units are not restricted from being removed. In a first state in which a contract for a service for using the consumable unit of the specific type provided by a service provider is in effect, the control unit sets the restricting unit to the restricted state in a case where all the plurality of consumable units mounted in the image forming apparatus are consumable units of the specific type, and sets the restricting unit to the unrestricted state in a case where at least one of the plurality of consumable units mounted in the image forming apparatus is the normal consumable unit.

An image forming apparatus includes a main frame, a plurality of process cartridges, a cartridge-supporting body, a belt, a belt cleaning unit, a waste toner cartridge, and a collective conveying unit. Each drum-cleaning unit collects waste toner on a corresponding photosensitive drum. The cartridge-supporting body supports the process cartridges and is movable between an internal position inside the main frame and an external position outside of the main frame. The belt cleaning unit collects waste toner on the belt. The waste toner cartridge accommodates both waste toner collected from the photosensitive drums by the drum-cleaning units and waste toner collected from the belt by the belt cleaning unit. The collective conveying unit aggregates both waste toner collected from the photosensitive drums by the drum-cleaning units and waste toner collected from the belt by the belt cleaning unit and conveys the aggregated waste toner to the waste toner cartridge.

An electrophotographic photosensitive member includes a support, an undercoat layer formed directly on the support, and a photosensitive layer formed on the undercoat layer, wherein when an ionization potential of the undercoat layer is represented by IPu, the IPu is 6.0 eV or higher, when an ionization potential of the support is represented by IPs, the IPs is lower than the IPu, the undercoat layer contains a compound (), when an ionization potential of the compound () is represented by IP, the IP is 5.0 eV or higher and 5.4 eV or lower, and the IPs and the IP satisfy the following relational expression (1):

[00001]$\begin{array}{cc}\mathrm{IPs}\mathrm{IP}-1..& \left(1\right)\end{array}$

A green toner for electrostatic charge image development, the green toner includes: green toner particles; and a lubricant externally added to the green toner particles, the green toner particles containing: a binder resin; an azomethine fluorescent pigment having an emission peak in a region of wavelengths of 500 nm or more and 550 nm or less of an emission spectrum; and a non-fluorescent pigment having a reflection peak in a region of wavelengths of 480 nm or more and 540 nm or less of a reflection spectrum, wherein a mass proportion of the azomethine fluorescent pigment in the green toner particles is 3% by mass or more and 10% by mass or less, and a mass-based ratio M1/M2 of a content M1 of the azomethine fluorescent pigment to a content M2 of the non-fluorescent pigment is 1 or more and 5 or less.

An electrophotographic photosensitive member, which is excellent in cleaning property and durability, and in which residual potential is reduced and occurrence of a crack is suppressed. In the electrophotographic photosensitive member including a surface layer, the surface layer contains: a binder resin; and organic resin particles, the binder resin has a specific structural unit, and the organic resin particles are each subjected to surface treatment with a specific compound.

A process unit includes a photosensitive drum rotatable about a rotational axis extending in a first direction. A development unit includes a development roller configured to supply toner to the photosensitive drum. A scanner unit is configured to expose the photosensitive drum. A reception portion is configured to receive toner from a toner container for supplying toner into the development unit. The scanner unit and the photosensitive drum overlap each other as viewed from a second direction perpendicular to the first direction and a gravitational direction. The scanner unit is arranged at a center in the first direction in an apparatus main body. The reception portion is arranged on a same side as the scanner unit with respect to the photosensitive drum in the second direction. The reception portion is closer to an end of the apparatus main body in the first direction than the scanner unit is.

An electrophotographic photosensitive member that can resist mass printing. The electrophotographic photosensitive member is an electrophotographic photosensitive member including a surface layer containing a binder resin and inorganic particles. The surface layer contains a urethane resin as the binder resin, wherein the value of the ratio of the volume of the inorganic particles to the volume of the binder resin in the surface layer is 0.10 or more and 3.0 or less. Protrusions derived from the inorganic particles are present on the surface of the surface layer. The inorganic particles to be incorporated into the surface layer have a number-based average primary particle diameter of 10 nm or more and 500 nm or less. The surface of the surface layer has a maximum height roughness Rz of 10 nm or more and 760 nm or less.

An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer provided on the conductive substrate, a charge generation layer provided on the undercoat layer, a charge transport layer provided on the charge generation layer, and a surface organic protective layer provided on the charge transport layer, in which the charge transport layer has a Young's modulus of 5,500 MPa or greater.

A positively chargeable electrophotographic photoreceptor includes a single layer-type photosensitive layer that contains a hole transport material, an electron transport material, a charge generation material, and a binder resin, in which the binder resin contains a resin A having an elastic deformation rate of 53.0% or more and a resin B having an elastic deformation rate difference of 12% or more and 17% or less with respect to the resin A.