An electronic device comprising: a first housing; a second housing; a hinge structure comprising a bracket and a mold member (230, 330), wherein the bracket includes first and second rotary shafts (221, 223) respectively attached to first and second flaps (222, 224) that are respectively inserted into the first housing and the second housing and configured to provide a pressing force to allow a selectable angle of rotation between the first housing and the second housing; and a hinge housing comprising an outer metal part and an inner insulating part formed of an insulating material the hinge housing being disposed between the first housing and the second housing and is open at opposite sides (2191, 2192) in the extension direction of the rotary shafts (221, 223), wherein the mold member (230, 330) is inserted into a first part of the hinge housing through one open side of the hinge housing, and the bracket being inserted into a second part of the hinge housing through an opposite open side of the hinge housing; wherein the first part of the hinge housing comprises a slit formed on the outer metal part, the slit forming a conductive pattern having a conductive area (2151, 2152) of a specified shape configured to form an antenna, wherein a portion of the insulating material is disposed in the slit to form part of the outer surface of the hinge housing together with the metal part, and a portion of the insulating material forms an insulating layer on an inner surface of the metal part of the hinge housing, wherein the insulating layer extends along the entire inner surface of the first part of the hinge housing except for a groove formed in the insulating layer, wherein the groove extends from the open one side of the hinge housing to a feeding area on the conductive area (2151, 2152) of the conductive pattern forming the antenna for supplying power to the conductive pattern, and wherein the mold (230, 330) comprises a first conductive area (231, 331) including a conductive feeding terminal (2311, 3311) that protrudes from the mold member (230, 330) to the inner surface of the metal part of the hinge housing to make contact with the feeding area of the conductive area (2151, 2152) of the conductive pattern for supplying power to the conductive pattern, wherein the protruding conductive feeding terminal (2311, 3311) is configured to be inserted along the groove to the feeding area of the conductive area (2151, 2152) of the conductive pattern when the mold member (230, 330) is inserted into the first part of the hinge housing through the open one side of the hinge housing. a first housing; a second housing; a hinge structure comprising a bracket and a mold member (230, 330), wherein the bracket includes first and second rotary shafts (221, 223) respectively attached to first and second flaps (222, 224) that are respectively inserted into the first housing and the second housing and configured to provide a pressing force to allow a selectable angle of rotation between the first housing and the second housing; and a hinge housing comprising an outer metal part and an inner insulating part formed of an insulating material the hinge housing being disposed between the first housing and the second housing and is open at opposite sides (2191, 2192) in the extension direction of the rotary shafts (221, 223), wherein the mold member (230, 330) is inserted into a first part of the hinge housing through one open side of the hinge housing, and the bracket being inserted into a second part of the hinge housing through an opposite open side of the hinge housing; wherein the first part of the hinge housing comprises a slit formed on the outer metal part, the slit forming a conductive pattern having a conductive area (2151, 2152) of a specified shape configured to form an antenna, wherein a portion of the insulating material is disposed in the slit to form part of the outer surface of the hinge housing together with the metal part, and a portion of the insulating material forms an insulating layer on an inner surface of the metal part of the hinge housing, wherein the insulating layer extends along the entire inner surface of the first part of the hinge housing except for a groove formed in the insulating layer, wherein the groove extends from the open one side of the hinge housing to a feeding area on the conductive area (2151, 2152) of the conductive pattern forming the antenna for supplying power to the conductive pattern, and wherein the mold (230, 330) comprises a first conductive area (231, 331) including a conductive feeding terminal (2311, 3311) that protrudes from the mold member (230, 330) to the inner surface of the metal part of the hinge housing to make contact with the feeding area of the conductive area (2151, 2152) of the conductive pattern for supplying power to the conductive pattern, wherein the protruding conductive feeding terminal (2311, 3311) is configured to be inserted along the groove to the feeding area of the conductive area (2151, 2152) of the conductive pattern when the mold member (230, 330) is inserted into the first part of the hinge housing through the open one side of the hinge housing.