Cleaning device and image forming apparatus including the same

A cleaning device comprising:

• a first cleaning member that is brought into contact with and separated from a surface of an endless belt at a predetermined timing and cleans the surface, the endless belt being looped over a plurality of rollers including a driving roller;
• a second cleaning member that cleans the surface of the endless belt, the second cleaning member being disposed upstream of the first cleaning member and downstream of the driving roller in a movement direction in which the endless belt moves, the second cleaning member being in contact with the endless belt so as to prevent a tension variation in a tension of the endless belt from affecting the driving roller, the tension variation occurring when the first cleaning member is brought into contact with and separated from the endless belt;
• and
• a third cleaning member that cleans the surface of the endless belt, the third cleaning member being disposed downstream of the first cleaning member in the movement direction of the endless belt, a contact state in which the third cleaning member is in contact with the endless belt being switched from a first contact state to a second contact state so as to reduce the tension variation, which occurs when the first cleaning member is brought into contact with and separated from the endless belt,
• wherein the third cleaning member is in contact with the endless belt in both the first contact state and the second contact state.