The pull-out aiding device 100 includes a pulling member 110 and a handle member 120. The pulling member 110 is movably coupled with the first partitioning wall 210, and includes a first pivot section 111 (see FIG. 4) and an abutting section 112, which are located at two opposite ends of the pulling member 110. The abutting section 112 is abutted against the corresponding apparatus 300 for pushing the latter forward. The handle member 120 includes a pressing section 121, a second pivot section 122 and an operating section 123. The second pivot section 122 is located adjacent to the pressing section 121 and pivotally connected to the first pivot section 111, such that the handle member 120 is turnable about the second pivot section 122 to move between a closed position, as shown in FIG. 1, and a pulled-out position, as shown in FIG. 2. The pressing section 121 has a closing edge 121A and a pulling-out edge 121B. As shown in FIG. 3, a vertical distance D1 between the pulling-out edge 121B and the second pivot section 122 is larger than a vertical distance D2 between the closing edge 121A and the second pivot section 122. However, it is not necessary for the vertical distance D1 to be larger than the vertical distance D2. In other possible arrangements, the vertical distance D1 between the pulling-out edge 121B and the second pivot section 122 can be equal to or smaller than the vertical distance D2 between the closing edge 121A and the second pivot section 122.