A display module includes a bottom casing, a panel device, and an upper casing. The bottom casing includes a casing body and a holding structure. The holding structure is integrally formed on the casing body and has a bottom pillar. The panel device is disposed on the bottom casing. The panel device includes at least one film component and a display panel. The film component has at least one positioning lug. The positioning lug is used for disposing around the bottom pillar so as to position the film component onto the holding structure. The display panel is disposed on the holding structure. The upper casing is disposed on the panel device for fixing the panel device cooperatively with the bottom casing.