There is provided a cleaning blade including an elastic member and a supporting member, in which a free end of the elastic member has an edge and a hardened surface constituting the edge. The cleaning blade satisfies a relationship of 0.10≤DHs≤0.40 and DHs≥DHm where DHs (mN/μm2) represents a dynamic hardness of the hardened surface and DHm (mN/μm2) represents a maximum value of a dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisect an angle of the edge satisfies 0 μm