Image forming apparatus

An image forming apparatus comprising:

• a rotatable image bearing member;
• a charging member configured to electrically charge a surface of the image bearing member to a predetermined polarity;
• a developing member configured to form a toner image on the surface of the image bearing member by supplying toner, charged to the same polarity as the predetermined polarity, to the surface of the image bearing member charged by the charging member;
• a transfer member configured to form a transfer nip in contact with the surface of the image bearing member and configured to transfer the toner image from the image bearing member onto a recording material passing through the transfer nip under application of a transfer voltage;
• an applying portion configured to apply, to the transfer member, the transfer voltage of a polarity opposite to the predetermined polarity;
• a recording material charging member provided on a side upstream of the transfer nip with respect to a conveying direction of the recording material nipped and conveyed through the transfer nip and capable of contacting an image forming surface which is a surface of the recording material, onto which the toner image is transferred, conveyed toward the transfer nip, and capable of charging the image forming surface to the same polarity as the predetermined polarity by triboelectric charge;
• an urging portion configured to urge the recording material charging member in a direction in which the contact portion of the recording material charging member is moved from an image forming surface side toward a surface side opposite from the image forming surface side,
• wherein a contact portion of the recording material charging member with the recording material is moved in a direction crossing the surface of the recording material at a position where the recording material opposes the recording material charging member by a force received from the recording material,
• wherein the recording material is of a first kind and a second kind greater in basis weight than the recording material of the first kind, and
• wherein the urging portion is configured so as to be capable of being positioned on a more downstream side in a direction in which the contact portion of the recording material charging member is moved from the surface side opposite from the image forming surface side toward the image forming surface side in a case that the recording material of the second kind is conveyed toward the transfer nip than in a case that the recording material of the first kind is conveyed toward the transfer nip.