Cleaning blade, process cartridge, and image forming apparatus

A cleaning blade, comprising;

• an elastic member to contact a surface of a cleaning target member and remove an adhering substance adhering to the surface of the cleaning target member,
• wherein the elastic member includes a base material and a surface layer including a cured product of a curable composition,
• wherein the surface layer is disposed on at least a part of a lower surface of the base material including a contact part to contact the cleaning target member, the lower surface of the base material being a surface of the base material facing a downstream side in a travelling direction of the cleaning target member with respect to the contact part,
• wherein the surface layer contains a siloxane-based compound,
• wherein Martens hardness of the surface layer measured with a nano indenter has a hardness gradient of decrease from a surface of the surface layer toward the lower surface of the base material in a film thickness direction of the surface layer, and the Martens hardness is 2.5 to 32.5 N/mm2 in a range from a vicinity of the surface (with a load of 1 μN) to a deepest part in the film thickness direction (with a load of 1000 μN),
• wherein an average film thickness of the surface layer is 10 μm or more to 500 μm or less, and
• wherein a content of the siloxane-based compound in the surface layer is 4 to 15% by mass.