An electronic device including an antenna is provided. The electronic device includes a first housing, a second housing for rotatably combining with the first housing, at least one hinge assembly configured to at least partially include an electric conductor portion, the at least one hinge assembly for rotatably coupling the second housing to the first housing, and at least one antenna device coupled to the at least one hinge assembly, in which the at least one antenna device includes a radiating conductor pattern and a ground patch, and the ground patch is electrically connected to the electric conductor portion of the at least one hinge assembly.