Cleaning blade, and cleaning apparatus, process cartridge, and image forming apparatus using the same

The present invention provides a cleaning blade, the cleaning blade contacting the surface to be cleaned with the member for cleaning the surface to be cleaned by means, wherein said cleaning blade at least the upper is material portion in contact with a surface of the cleaning member satisfies the following inequalities (1) to (3): inequality (1) 3.92≤M≤29.42; inequality (2) 0 <α≤0.294; and inequalities (3) S≥250, ( in inequality (1) to (3), M represents a 100% modulus (MPa); α represents the stress - strain curve at 100% to 200% strain range, stress change ([Delta] stress) to the strain variation (strain [Delta]) of the stress ratio of {Δ / Δ degree of strain = (stress at 200% strain degree - stress at 100% strain degree) / (200-100)} (MPa /%); Moreover, S represents according to JIS K6251 (using a dumbbell-shaped No. 3 test piece) was measured elongation at break (%)). The present invention also provides a composition comprising a cleaning blade of the cleaning device, a process cartridge and an image forming apparatus.