A cleaning device has: a cleaning frame; a cleaning member which, after transfer through contact with an image bearing member, removes a developer remaining on the image bearing member; and a sheet member having flexibility and coming into contact with the image bearing member at an upstream side of a contact position between the cleaning member and the image bearing member in the rotation direction of the image bearing member. An external additive is an inorganic salt having a charging polarity on the positive side with respect to the developer, and work functions Φ(S), Φ(A), Φ(T) of the sheet member, the external additive and the developer satisfy 0≤|Φ(A)−Φ(S)|