position of the sheet trailing edge can be located further upstream than in the conventional technology this makes it possible to avoid the event involving the occurrence of unpleasant motor noise when the reverse speed of the sheet is substantially increased as well as to increase the image output productivity as described above at the time when the sheet trailing edge reaches the position downstream the gate member 175 and in the vicinity of the gate member 175 the conveyance before reversal is completed then the sheet reversing and conveying member which can be rotated forwardly and reversely starts the reverse drive the sheet p is conveyed through the branched conveyance path 179 to the paper ejecting section 81 with a guide surface 175 b opposite to the guide surface 175 a of the switched gate member 175 as a guide thereby the sheet p reaches the paper ejecting section 81 in this embodiment the opening and closing operation of the gate member 175 is controlled based on the detection of the entrance sensor 62 placed upstream the reversal timing sensor 63 because of this feature the spacing between the reversal sensor 63 and the gate member 175 is narrow so that the opening and closing timing of the gate member 175 can be precisely performed in the apparatus that conveys the sheet p at high speed however the invention is not limited to this embodiment and can be designed that the opening operation of the gate member 175 is carried out based on the detection information by the entrance sensor 62 and the closing operation is.