In an image forming apparatus including a transfer apparatus which transfers a toner image formed on an image bearing member to a transfer material in a transfer portion and a guide member which guides the transfer material conveyed toward the transfer portion, a contact portion which comes into contact with the transfer material in the guide member is made of a material which is charged in the same polarity as toner by friction against the transfer material, and surface resistivity is not lower than 10³ /sq and not more than 10¹¹ /sq.