An image forming apparatus has: an image bearing member that bears a toner image and moves; a transfer means that transfers the toner image on the image bearing member to a transfer medium; a first eliminating member that comes in contact with the image bearing member and collects and eliminates the toner on the image bearing member by applying a bias in a first eliminating area where toner is eliminated from the image bearing member; a second eliminating member that comes in contact with the image bearing member so as to eliminate the toner on the image bearing member in a second eliminating area where the toner remaining on the image bearing member from which the toner is eliminated in the first eliminating area is eliminated; a controller that variably controls a bias condition of the bias to be applied to the first eliminating means based on a relationship between voltage and electric current when a test bias is applied to the first eliminating means in contact with the image bearing member; and a separating member that separates the second eliminating means from the image bearing member when a part of the image bearing member which passes through the first eliminating area during application of the test bias to the first eliminating means is in the second eliminating area.