A portable communication device comprising: a communication circuit ; a foldable housing including a first housing , a second housing , and a hinge disposed between the first housing and the second housing , the first housing including a first side member forming a periphery of the first housing and the second housing including a second side member disposed around the second housing ; a flexible display disposed on the foldable housing, wherein at least a part of the flexible display is configured to be folded; a first non-conductive frame coupled to the first side member such that the first non-conductive frame covers a boundary of the flexible display ; and a second non-conductive frame facing the first non-conductive frame in the folded state of the foldable housing and coupled to the second side member such that the second non-conductive frame covers a boundary of the flexible display , wherein the first side member includes a first non-conductive portion , a second non-conductive portion , and a first conductive portion disposed between the first non-conductive portion and the second non-conductive portion , operably connected with the communication circuit and coupled to at least a portion of the first non-conductive frame , the second side member includes a third non-conductive portion , a fourth non-conductive portion , and a second conductive portion disposed between the third non-conductive portion and the fourth non-conductive portion and coupled to at least a portion of the second non-conductive frame , characterized in that the first conductive portion and the second conductive portion are spaced apart from each other at least by the first non-conductive frame and the second non-conductive frame in a folded state of the foldable housing. a communication circuit ; a foldable housing including a first housing , a second housing , and a hinge disposed between the first housing and the second housing , the first housing including a first side member forming a periphery of the first housing and the second housing including a second side member disposed around the second housing ; a flexible display disposed on the foldable housing, wherein at least a part of the flexible display is configured to be folded; a first non-conductive frame coupled to the first side member such that the first non-conductive frame covers a boundary of the flexible display ; and a second non-conductive frame facing the first non-conductive frame in the folded state of the foldable housing and coupled to the second side member such that the second non-conductive frame covers a boundary of the flexible display , wherein the first side member includes a first non-conductive portion , a second non-conductive portion , and a first conductive portion disposed between the first non-conductive portion and the second non-conductive portion , operably connected with the communication circuit and coupled to at least a portion of the first non-conductive frame , the second side member includes a third non-conductive portion , a fourth non-conductive portion , and a second conductive portion disposed between the third non-conductive portion and the fourth non-conductive portion and coupled to at least a portion of the second non-conductive frame , characterized in that the first conductive portion and the second conductive portion are spaced apart from each other at least by the first non-conductive frame and the second non-conductive frame in a folded state of the foldable housing. <EOS>