An antenna module according to an embodiment comprises: a first layer which is arranged on the front surface of a dielectric substrate, and which is composed of a radiator region having a metal mesh grid, and a dummy region having a dummy mesh grid formed of a plurality of patterns; and a second layer which is arranged on the rear surface of the dielectric substrate and which allows the metal mesh grid to operate as a ground. The plurality of patterns can form a first metal line to a fourth metal line, the first metal line and the third metal line can be parallel to each other, the second metal line can connect the first metal line to the third metal line, and the fourth metal line can be connected to a second end portion of the third metal line.