An image forming apparatus comprising: a photosensitive drum; charging means for charging said photosensitive drum; an exposing apparatus for exposing said photosensitive drum, which is charged by said charging means, to form an electrostatic latent image on said photosensitive drum; developing means for developing the electrostatic image using toner to form a toner image; a recording material bearer for bearing the recording material and conveying; a transfer member for transferring the toner image, which is formed on said photosensitive drum, onto a recording material born on said recording material bearer at a transfer portion, wherein the transfer member is arranged opposite to a surface of the recording material bearer which faces the photosensitive drum; a cleaning member for cleaning said recording material bearer; and a charging bias applying power supply arranged to apply a charging voltage, of which an AC voltage and a DC voltage are superposed, to said charging means when charging said photosensitive drum for forming the electrostatic latent image on said photosensitive drum, the charging bias applying power supply arranged to apply a return voltage to said charging means when returning toner adhered to said charging means to said photosensitive drum, wherein the return voltage does not include an AC voltage and includes a DC voltage having same polarity as that of the DC voltage included in the charging voltage, or the return voltage is voltage of which the DC voltage having same polarity as that of the DC voltage included in the charging voltage and an AC voltage having smaller amplitude than that of the AC voltage included in the charging voltage are superposed; characterized by further comprising a transferring bias applying power supply arranged to apply a first transfer bias to said transfer member when transferring the toner image to the recording material, the transferring bias applying power supply applying a second transfer bias to the transfer member when the toner, which is returned from the charging means to the photosensitive drum by applying the return voltage, is transferred from the photosensitive drum to the recording material bearer, wherein the second transfer bias has same polarity as that of the first transfer bias, a current which flows when applying the second transfer bias to the transfer member is smaller than a current which flows when applying the first transfer bias to the transfer member, and the second transfer bias has opposite polarity to that of the DC voltage of the return voltage. a photosensitive drum; charging means for charging said photosensitive drum; an exposing apparatus for exposing said photosensitive drum, which is charged by said charging means, to form an electrostatic latent image on said photosensitive drum; developing means for developing the electrostatic image using toner to form a toner image; a recording material bearer for bearing the recording material and conveying; a transfer member for transferring the toner image, which is formed on said photosensitive drum, onto a recording material born on said recording material bearer at a transfer portion, wherein the transfer member is arranged opposite to a surface of the recording material bearer which faces the photosensitive drum; a cleaning member for cleaning said recording material bearer; and a charging bias applying power supply arranged to apply a charging voltage, of which an AC voltage and a DC voltage are superposed, to said charging means when charging said photosensitive drum for forming the electrostatic latent image on said photosensitive drum, the charging bias applying power supply arranged to apply a return voltage to said charging means when returning toner adhered to said charging means to said photosensitive drum, wherein the return voltage does not include an AC voltage and includes a DC voltage having same polarity as that of the DC voltage included in the charging voltage, or the return voltage is voltage of which the DC voltage having same polarity as that of the DC voltage included in the charging voltage and an AC voltage having smaller amplitude than that of the AC voltage included in the charging voltage are superposed; a transferring bias applying power supply arranged to apply a first transfer bias to said transfer member when transferring the toner image to the recording material, the transferring bias applying power supply applying a second transfer bias to the transfer member when the toner, which is returned from the charging means to the photosensitive drum by applying the return voltage, is transferred from the photosensitive drum to the recording material bearer, wherein the second transfer bias has same polarity as that of the first transfer bias, a current which flows when applying the second transfer bias to the transfer member is smaller than a current which flows when applying the first transfer bias to the transfer member, and the second transfer bias has opposite polarity to that of the DC voltage of the return voltage.