An antenna using a liquid metal is provided. The antenna includes a plurality of antenna structures, each having an inner cavity of a form corresponding to a radiator pattern; and at least one actuator connected to at least two of the plurality of antenna structures to control movement of the liquid metal to supply the liquid metal to at least one of the antenna structures. Thereby, deterioration of an antenna performance due to an influence of a human body can be prevented, and deterioration of an antenna performance can be prevented due to a form change of an electronic device including the antenna. In this manner, optimal antenna radiation performance can be dynamically realized.