A conductive member evaluator includes a first electrode which has contact with an outer circumferential face of a conductive member, a second electrode which is connected to the shaft center of the conductive member, a voltage applier configured to apply evaluation voltage including at least an AD component between the first electrode and the second electrode, a current value measuring device configured to measure a current value flowing between the first electrode and the second electrode when the evaluation voltage is applied, an extreme value obtaining device configured to obtain at least one extreme value of a maximum value and a minimum value in one cycle of the AD component included in the current value from the current value measured by the current value measuring device; and an evaluation device configured to evaluate the conductive member based on the extreme value obtained by the extreme value obtaining device.