Various embodiments of the disclosure relate to an electronic device including an antenna. An electronic device may include: a housing, a main substrate s disposed in an inner space of the housing and including a first surface facing a first direction and a second surface facing a second direction opposite to the first direction, and an antenna module disposed on the main substrate, wherein the antenna module includes a first substrate disposed on the first surface of the main substrate and including at least one antenna, the main substrate including multiple through-holes, multiple antenna structures disposed to penetrate the multiple through-holes, respectively, and include at least one antenna element including at least one antenna spaced at a designated interval, and matching structure comprising impedance matching circuitry disposed on the first substrate and configured to match impedance for the at least one antenna element included in each of the multiple antenna structures.