A pressing pad for assembling a display module by applying a pressure to a flexible display panel to attach the flexible display panel to a window member and a method of assembling a display module, the pressing pad including a first pressing part that applies a first pressure onto a display area of the flexible display panel; a second pressing part that applies a second pressure onto a pad area of the flexible display panel, the second pressure being less than the first pressure and the pad area of the flexible display panel being adjacent to the display area of the flexible display panel; and a support part that supports the first and second pressing parts, wherein the second pressing part has a height from the support part that is less than a height of the first pressing part.