A display device includes: a display panel including a plurality of pad electrodes arranged in a first direction; a printed circuit board including a plurality of lead electrodes facing the plurality of pad electrodes, respectively; a plurality of conductive particles disposed between the display panel and the printed circuit board at predetermined intervals; and a coating layer disposed on the plurality of conductive particles and having a thickness varying in the first direction from each of the plurality of lead electrodes toward each of the plurality of pad electrodes.