Provided is a display apparatus including a display panel, multiple antenna electrodes, a dummy electrode, and multiple feed lines. The display panel has a display area. The antenna electrodes are disposed on the display panel and overlap the display area. The dummy electrode is disposed around the antenna electrodes and overlaps the display area. The dummy electrode is electrically separated from the antenna electrodes, and has multiple dummy wire segments whose extension directions intersect each other. The dummy wire segments have multiple breaks. The feed lines are respectively electrically connected to the antenna electrodes. An antenna module is also provided.