A foldable electronic device according to certain embodiments comprises a display, a cover covering one or more hinges, and a flexible printed circuit board disposed between the flexible display and the cover, wherein the flexible printed circuit board includes, a cover section accommodated in the cover, a first connection section extending to a first side of the cover section, and a second connection section extending to a second side of the cover section, wherein the cover section includes a first fixing area extending from the first connection section and configured to fix an area of the flexible printed circuit board to the electronic device, a second fixing area extending from the second connection section and configured to fix another area of the flexible printed circuit board to the electronic device, and a deformable area disposed between the first fixing area and the second fixing area, and wherein a number of multiple conductive layers forming the first fixing area and a number of conductive layers forming the second fixing area are equal to each other, and a number of multiple conductive layers forming the deformable area and the number of multiple conductive layers forming the first fixing area are different from each other.