A sheet conveying apparatus includes a casing, a first conveying path, a second conveying path, a joining conveyance path, and a guide member. The joining conveyance path is connected to a junction portion of the first conveying path and the second conveying path, and extends downward in a sheet conveying direction. The guide member is disposed in the junction portion of the first conveying path and the second conveying path, and shifted to a position between a first position to guide the first sheet from the first conveying path to the joining conveyance path and a second position to guide the second sheet from the second conveying path to the joining conveyance path. The guide member includes a supporting point portion disposed at a central part or around thereof in a lengthwise direction, so as to change in position by pivoting around the supporting point portion.