A foldable electronic device comprising: a first housing and a second housing ; hinge structures connected to the first housing and the second housing; and a display , at least a portion of which is disposed over the first housing, the hinge structures, and the second housing, wherein the each hinge structure includes: a first rotary shaft configured to be rotated with respect to a first axis , a second rotary shaft configured to be rotated with respect to a second axis , a first arm part connected to the first rotary shaft; a second arm part connected to the second rotary shaft; a first rotation part connected to the first arm part and configured to be rotated with respect to a third axis; a second rotation part connected to the second arm part and configured to be rotated with respect to a fourth axis; a center bar disposed between the first rotary shaft and the second rotary shaft and disposed to face at least a portion of a rear surface of the display, wherein a fixing ring is formed on one side of the center bar in a second direction that is opposite to a first direction that faces the display and integrally formed with the center bar ; and a stabilizer having a band or ring shape and configured to guide upward/downward movement of the center bar, wherein the one side of the stabilizer is coupled to the fixing ring. a first housing and a second housing ; hinge structures connected to the first housing and the second housing; and a display , at least a portion of which is disposed over the first housing, the hinge structures, and the second housing, wherein the each hinge structure includes: a first rotary shaft configured to be rotated with respect to a first axis , a second rotary shaft configured to be rotated with respect to a second axis , a first arm part connected to the first rotary shaft; a second arm part connected to the second rotary shaft; a first rotation part connected to the first arm part and configured to be rotated with respect to a third axis; a second rotation part connected to the second arm part and configured to be rotated with respect to a fourth axis; a center bar disposed between the first rotary shaft and the second rotary shaft and disposed to face at least a portion of a rear surface of the display, wherein a fixing ring is formed on one side of the center bar in a second direction that is opposite to a first direction that faces the display and integrally formed with the center bar ; and a stabilizer having a band or ring shape and configured to guide upward/downward movement of the center bar, wherein the one side of the stabilizer is coupled to the fixing ring. a first rotary shaft configured to be rotated with respect to a first axis , a second rotary shaft configured to be rotated with respect to a second axis , a first arm part connected to the first rotary shaft; a second arm part connected to the second rotary shaft; a first rotation part connected to the first arm part and configured to be rotated with respect to a third axis; a second rotation part connected to the second arm part and configured to be rotated with respect to a fourth axis; a center bar disposed between the first rotary shaft and the second rotary shaft and disposed to face at least a portion of a rear surface of the display, wherein a fixing ring is formed on one side of the center bar in a second direction that is opposite to a first direction that faces the display and integrally formed with the center bar ; and a stabilizer having a band or ring shape and configured to guide upward/downward movement of the center bar, wherein the one side of the stabilizer is coupled to the fixing ring. <EOS>