Image forming apparatus

An image forming apparatus, comprising:

• a transfer means which transfers to recording materials unfixed images borne by an image bearing member;
• a fixing means which fixes the transferred unfixed image on the recording materials;
• a loop detecting means which detects a loop of the recording material to be formed between the transfer means and the fixing means;
• a recording material detection means which determines that the recording materials have reached to the fixing means;
• and
• a control means which controls conveyance speed of the recording material by the fixing means;
• wherein based on detected result of the recording material detection means and the loop detecting means, and length of the recording material, the control means sets the conveyance speed of the fixing means so that when the rear end of the recording material passes through the transfer means after the loop detecting means detects a loop of the recording material, a loop length of the recording materials will be set to a lower limit length, and the control means controls the conveyance speed of the fixing means at the set conveyance speed.