A mobile terminal comprising: a first frame ; a second frame slidably coupled to the first frame and configured to: move with respect to the first frame in a first direction while the mobile terminal is in a first state; and move with respect to the first frame in a second direction while the mobile terminal is in a second state, the second direction being opposite to the first direction; a third frame configured to move in the first direction or the second direction with respect to the second frame ; a flexible display comprising: a first region coupled to the first frame ; a second region coupled to the third frame ; and a third region positioned between the first region and the second region and configured to curve around the second frame ; and a display frame coupled to a rear surface of the third region of the flexible display , wherein the second frame comprises a side portion positioned at an end thereof facing in a third direction perpendicular to the first direction and a guide rail formed on the side portion , wherein the display frame comprises a guide hook positioned at an end thereof and inserted into the guide rail , and wherein the side portion comprises: a rear side portion ; a front side portion arranged in front of the rear side portion ; and an opening portion arranged on the front side portion , and covered by the end of the display frame . a first frame ; a second frame slidably coupled to the first frame and configured to: move with respect to the first frame in a first direction while the mobile terminal is in a first state; and move with respect to the first frame in a second direction while the mobile terminal is in a second state, the second direction being opposite to the first direction; move with respect to the first frame in a first direction while the mobile terminal is in a first state; and move with respect to the first frame in a second direction while the mobile terminal is in a second state, the second direction being opposite to the first direction; a third frame configured to move in the first direction or the second direction with respect to the second frame ; a flexible display comprising: a first region coupled to the first frame ; a second region coupled to the third frame ; and a third region positioned between the first region and the second region and configured to curve around the second frame ; and a first region coupled to the first frame ; a second region coupled to the third frame ; and a third region positioned between the first region and the second region and configured to curve around the second frame ; and a display frame coupled to a rear surface of the third region of the flexible display , wherein the second frame comprises a side portion positioned at an end thereof facing in a third direction perpendicular to the first direction and a guide rail formed on the side portion , wherein the display frame comprises a guide hook positioned at an end thereof and inserted into the guide rail , and wherein the side portion comprises: a rear side portion ; a front side portion arranged in front of the rear side portion ; and an opening portion arranged on the front side portion , and covered by the end of the display frame . a rear side portion ; a front side portion arranged in front of the rear side portion ; and an opening portion arranged on the front side portion , and covered by the end of the display frame . <EOS>