A portable communication device comprising: a housing including a first housing and a second housing; a hinge structure connected with the first housing and the second housing; a flexible display accommodated in the first housing and the second housing; the hinge structure including: a first arm configured to rotate about a first axis; a first fixing part; a second arm configured to rotate about a second axis; a second fixing part; a fixed bracket including a first rail groove and a second rail groove; a first rotary bracket including a first sliding opening (211_2) and a first arc-shaped rail (211_3) formed therein, wherein the first fixing part slides along the first sliding opening (211_2) as the first arm rotates about the first axis, the first rotary bracket being coupled with the fixed bracket such that the first rotary bracket rotates about a third axis by the first arc-shaped rail (211_3) slides along the first rail groove as the first arm rotates about the first axis; a second rotary bracket including a second sliding opening (212_2) and a second arc-shaped rail (212_3) that has substantially the same shape as the first arc-shaped rail (211_3) formed therein, wherein the second fixing part slides along the second sliding opening (212_2) as the second arm rotates about the second axis, the second rotary bracket being coupled with the fixed bracket such that the second rotary bracket rotates about a fourth axis by the second arc-shaped rail (212_3) slides along the second rail groove as the second arm rotates about the second axis; wherein at least part of the flexible display is configured to be bent as the first rotary bracket rotates about the third axis and the second rotary bracket rotates about the fourth axis. a housing including a first housing and a second housing; a hinge structure connected with the first housing and the second housing; a flexible display accommodated in the first housing and the second housing; the hinge structure including: a first arm configured to rotate about a first axis; a first fixing part; a second arm configured to rotate about a second axis; a second fixing part; a fixed bracket including a first rail groove and a second rail groove; a first rotary bracket including a first sliding opening (211_2) and a first arc-shaped rail (211_3) formed therein, wherein the first fixing part slides along the first sliding opening (211_2) as the first arm rotates about the first axis, the first rotary bracket being coupled with the fixed bracket such that the first rotary bracket rotates about a third axis by the first arc-shaped rail (211_3) slides along the first rail groove as the first arm rotates about the first axis; a second rotary bracket including a second sliding opening (212_2) and a second arc-shaped rail (212_3) that has substantially the same shape as the first arc-shaped rail (211_3) formed therein, wherein the second fixing part slides along the second sliding opening (212_2) as the second arm rotates about the second axis, the second rotary bracket being coupled with the fixed bracket such that the second rotary bracket rotates about a fourth axis by the second arc-shaped rail (212_3) slides along the second rail groove as the second arm rotates about the second axis; wherein at least part of the flexible display is configured to be bent as the first rotary bracket rotates about the third axis and the second rotary bracket rotates about the fourth axis. a first arm configured to rotate about a first axis; a first fixing part; a second arm configured to rotate about a second axis; a second fixing part; a fixed bracket including a first rail groove and a second rail groove; a first rotary bracket including a first sliding opening (211_2) and a first arc-shaped rail (211_3) formed therein, wherein the first fixing part slides along the first sliding opening (211_2) as the first arm rotates about the first axis, the first rotary bracket being coupled with the fixed bracket such that the first rotary bracket rotates about a third axis by the first arc-shaped rail (211_3) slides along the first rail groove as the first arm rotates about the first axis; a second rotary bracket including a second sliding opening (212_2) and a second arc-shaped rail (212_3) that has substantially the same shape as the first arc-shaped rail (211_3) formed therein, wherein the second fixing part slides along the second sliding opening (212_2) as the second arm rotates about the second axis, the second rotary bracket being coupled with the fixed bracket such that the second rotary bracket rotates about a fourth axis by the second arc-shaped rail (212_3) slides along the second rail groove as the second arm rotates about the second axis; wherein at least part of the flexible display is configured to be bent as the first rotary bracket rotates about the third axis and the second rotary bracket rotates about the fourth axis.