Image forming apparatus

An image forming apparatus, comprising:

• an image bearing member configured to bear a toner image thereon;
• an intermediate transferring member onto which the toner image is to be primarily transferred from the image bearing member;
• a secondary transfer member configured to secondarily transfer the toner image from the intermediate transferring member onto a recording material;
• a transfer power supply unit configured to apply a transfer voltage to the secondary transfer member;
• a first charging member configured to charge a residual toner remaining on the intermediate transferring member;
• a second charging member configured to charge the residual toner remaining on the intermediate transferring member;
• a charging power supply unit configured to apply a charging voltage to each of the first charging member and the second charging member;
• and
• a control unit configured to control the charging power supply unit,
• wherein the control unit being configured to cause a voltage with a polarity opposite to an original charging polarity of a toner to be applied from the charging power supply unit to the first charging member and the second charging member in a first mode in which application of a first transfer voltage from the transfer power supply unit to the secondary transfer member is set, and cause the voltage with the original charging polarity to be applied from the charging power supply unit to the first charging member and the voltage with the opposite polarity to be applied from the charging power supply unit to the second charging member in a second mode in which application of a second transfer voltage higher than the first transfer voltage from the transfer power supply unit to the secondary transfer member is set.