A cleaning blade for an electrophotographic apparatus including a thermosetting polyurethane elastomer blade member, in which in the blade member, a concentration of nitrogen is gradually increased from an inside of a contact region to contact the image bearing member toward the surface of the contact region; and a relationship between an amount of the concentration of nitrogen to be changed Δ1=N0−N5 and an amount of the concentration of nitrogen to be changed Δ2=N5−Ne is Δ1>Δ2 wherein a concentration of nitrogen in the surface N0 is not less than 1.5 wt % and not more than 20.0 wt %, a concentration of nitrogen Ne at a depth in which the concentration of nitrogen is no longer changed is not less than 0.7 wt % and not more than 10 wt %, and N5 is a concentration of nitrogen at a depth of 5 μm.