Antenna device, and electronic device comprising same

An electronic device may comprise: a housing comprising a first plate which faces a first direction and a second plate which faces a second direction opposite to the first direction, the housing having a space formed between the first plate and the second plate; a side member which surrounds at least a part of the space; a display which is disposed inside the housing and is exposed through the first plate; a printed circuit board which is disposed inside the housing and is disposed between the display and the second plate; and a communication module which is disposed inside the housing and is coupled to the printed circuit board. The side member may comprise: a first conductive member which extends around the space; a second conductive member which extends around the space so as to be in parallel with the first conductive member, wherein the first conductive member is spaced from the second conductive member, the second conductive member is more adjacent to the second plate than the first conductive member, and the second conductive member has at least a part which is electrically connected to the communication module; and a first insulating member which extends around the space so as to be in parallel with the first conductive member and is disposed between the first conductive member and the second conductive member. In addition, other various embodiments are possible.