Cleaning blade

A cleaning blade, having an elastic body formed of a rubber base material molded product, and a surface treatment layer on at least an area of the elastic body to be brought into contact with a cleaning object, characterized in that:

• the surface treatment layer is formed by impregnating a surface portion of the elastic body with a surface treatment liquid containing an isocyanate compound and an organic solvent, and hardening the liquid;
• the surface treatment liquid concentration of the surface treatment layer has such a profile that the impregnation concentration gradually decreases from the surface toward the depth direction;
• the surface treatment layer has an elastic modulus of 60 MPa or lower;
• the elastic body has an elastic modulus of 3 MPa to 35 MPa;
• the difference in elastic modulus between the surface treatment layer and the elastic body is 1 MPa to 25 MPa;
• and
• index M, which is calculated from a breaking elongation (%) of the elastic body at 23° C., a tan δ (1 Hz) peak temperature (° C.) of the elastic body, and an impregnation depth (μm) of the surface treatment liquid by the following formula:
• Index M=[breaking elongation (%) of the elastic body at 23° C.]×[tan δ (1 Hz) peak temperature (° C.)]×(−1)/[impregnation depth (μm) of the surface treatment liquid] is 1 to 1,100.