To maximally suppress a cost increase and the upsizing of an apparatus even if recording is performed on a large-sized sheet.

A both-side reversing part comprising a both-side unit 61 and an extension unit 65 is provided at the back of an image forming apparatus body where an image is formed by a recording head 7. Conveyance rollers 63a, 63b, 63c are arranged in a both-side conveyance path 62 of the both-side unit 61. No conveyance roller is not arranged in the extension conveyance path 67 of the extension unit 65. When recording is performed on both sides of the large-sized sheet, the sheet is reversed by the extension conveyance path 67 having a longer path than the both-side conveyance path 62.