Abstract: A wearable antenna comprises: an upper substrate made of a solid material; an inner open ring radiator formed on an upper surface of the upper substrate and having a first slit formed therein; an outer open ring radiator formed in a ring shape having the same center as the inner open ring radiator and having a larger radius on the upper surface, and having a second slit formed therein to open a partial area; a feeding portion formed on a lower surface of the upper substrate and transmitting a feed signal applied from an input port to each of the two open ring radiators through two vias penetrating the upper substrate; a lower substrate spaced apart from the lower surface of the upper substrate by a predetermined distance and made of a flexible material; and a ground plane formed on a lower surface of the lower substrate.