IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of excellently recovering a correction pattern by a cleaning roller.SOLUTION: A color laser printer 1 is configured so that a positive integer number N satisfying the following mathematical formula (1) in relation to each optional value n exists in all values from 1 to the value n: (T×N+L)/n≤R/V≤(T×(N+1)-L)/n ... mathematical formula (1) in which a circumferential length of a cleaning roller 22 is R, the length of a patch Q in a moving direction of a conveyance belt 10 is L, a formation interval of the patch Q in the moving direction of the conveyance belt 10 is T, a ratio of peripheral velocity of the cleaning roller 22 to moving speed of the conveyance belt 10 is V, and a positive integer number is n.