An electronic device comprising: a first body and a second body; a flexible display comprising a first portion of the flexible display supported by the first body and a second portion of the flexible display supported by the second body; and a hinge part configured to connect the first body and the second body, and supporting a third portion of the flexible display between the first portion of the flexible display and the second portion of the flexible display, the hinge part comprising: a plurality of slit members configured to support the third portion of the flexible display between the first portion of the flexible display and the second portion of the flexible display, wherein the plurality of slit members are arranged in a longitudinal direction of the flexible display to be spaced apart from each other; and a supporting member configured to support the plurality of slit members when the flexible display is in an unfolded state; characterised by the electronic device further comprising: a plurality of sliding units (6, 7), each of the plurality of sliding units (6, 7) comprising a sliding plate and a sliding frame and being coupled to either of the first body or the second body, wherein the sliding plate is movably connected to the sliding frame in the longitudinal direction of the flexible display, wherein the plurality of sliding units (6, 7) includes a first sliding unit (6, 7) and a second sliding unit (6, 7), wherein the first sliding unit (6, 7) includes a first sliding plate that is coupled to the hinge part and a first sliding frame that is coupled to the first body, and wherein the second sliding unit (6, 7) includes a second sliding plate that is coupled to the hinge part and a second sliding frame that is coupled to one of the second body. a first body and a second body; a flexible display comprising a first portion of the flexible display supported by the first body and a second portion of the flexible display supported by the second body; and a hinge part configured to connect the first body and the second body, and supporting a third portion of the flexible display between the first portion of the flexible display and the second portion of the flexible display, the hinge part comprising: a plurality of slit members configured to support the third portion of the flexible display between the first portion of the flexible display and the second portion of the flexible display, wherein the plurality of slit members are arranged in a longitudinal direction of the flexible display to be spaced apart from each other; and a supporting member configured to support the plurality of slit members when the flexible display is in an unfolded state; characterised by the electronic device further comprising: a plurality of sliding units (6, 7), each of the plurality of sliding units (6, 7) comprising a sliding plate and a sliding frame and being coupled to either of the first body or the second body, wherein the sliding plate is movably connected to the sliding frame in the longitudinal direction of the flexible display, wherein the plurality of sliding units (6, 7) includes a first sliding unit (6, 7) and a second sliding unit (6, 7), wherein the first sliding unit (6, 7) includes a first sliding plate that is coupled to the hinge part and a first sliding frame that is coupled to the first body, and wherein the second sliding unit (6, 7) includes a second sliding plate that is coupled to the hinge part and a second sliding frame that is coupled to one of the second body. a plurality of slit members configured to support the third portion of the flexible display between the first portion of the flexible display and the second portion of the flexible display, wherein the plurality of slit members are arranged in a longitudinal direction of the flexible display to be spaced apart from each other; and a supporting member configured to support the plurality of slit members when the flexible display is in an unfolded state; characterised by the electronic device further comprising: a plurality of sliding units (6, 7), each of the plurality of sliding units (6, 7) comprising a sliding plate and a sliding frame and being coupled to either of the first body or the second body, wherein the sliding plate is movably connected to the sliding frame in the longitudinal direction of the flexible display, wherein the plurality of sliding units (6, 7) includes a first sliding unit (6, 7) and a second sliding unit (6, 7), wherein the first sliding unit (6, 7) includes a first sliding plate that is coupled to the hinge part and a first sliding frame that is coupled to the first body, and wherein the second sliding unit (6, 7) includes a second sliding plate that is coupled to the hinge part and a second sliding frame that is coupled to one of the second body.