A thin-film antenna, a displaying module and a displaying device. The thin-film antenna includes a first region and a second region, and the thin-film antenna includes: an antenna functional layer, a first film layer and a lead-wire layer that are arranged in stack. The antenna functional layer includes an antenna coil, the antenna coil is located within the first region, the lead-wire layer includes a lead wire and a terminal connected to the lead wire, the terminal is located within the second region, and the lead wire and the antenna coil are connected by a via hole provided in the first film layer. The thin-film antenna according to the present embodiment may be adhered to the back surface of the display panel, and the component for shielding signals such as a middle frame is not required to be provided between the antenna and the display panel.