A mobile terminal comprising: a wireless communication unit adapted to send or receive messages including at least one object; a detector adapted to detect the at least one object included in the messages; wherein the at least one object is one of an image, an audio, a movie and a text containing link information; a display unit having a first region and a second region and adapted to display the messages sent or received by the wireless communication unit on the first region; and a controller adapted to display at least one representative image (340 - 347) corresponding to each of the detected at least one object included in the messages on the second region; wherein the controller is further adapted upon selection of at least one representative image (340 - 347) by a user to change an output range of the display unit to display messages related to an object corresponding to one of the at least one representative image (340 - 347) selected by the user on the first region, and to output the object corresponding to the one of the at least one representative image (340 - 347), wherein the messages related to the object corresponding to the one of the at least one of representative image (340 - 347) are displayed along with the object corresponding to the one of the at least one representative image (340 - 347) on the first region, wherein the first region having a third region and a fourth region, the object corresponding to the one of the at least one of representative image, and the messages related to the object corresponding to the one of the at least one of representative image are displayed on the fourth region, wherein the display unit is adapted to support touch input, and the object corresponding to the one of the at least one of representative image output to the third region is changed to another object on the basis of touch input sensed in the third region, wherein the controller is adapted to group the detected at least one object corresponding to the representative image displayed on the second region according to at least one of specifications including a format of the detected at least one object, sending or receiving order, and a sender or receiver, and a change of the object corresponding to the one of the at least one of representative image output to the third region is made within the same group. a wireless communication unit adapted to send or receive messages including at least one object; a detector adapted to detect the at least one object included in the messages; wherein the at least one object is one of an image, an audio, a movie and a text containing link information; a display unit having a first region and a second region and adapted to display the messages sent or received by the wireless communication unit on the first region; and a controller adapted to display at least one representative image (340 - 347) corresponding to each of the detected at least one object included in the messages on the second region; wherein the controller is further adapted upon selection of at least one representative image (340 - 347) by a user to change an output range of the display unit to display messages related to an object corresponding to one of the at least one representative image (340 - 347) selected by the user on the first region, and to output the object corresponding to the one of the at least one representative image (340 - 347), wherein the messages related to the object corresponding to the one of the at least one of representative image (340 - 347) are displayed along with the object corresponding to the one of the at least one representative image (340 - 347) on the first region, wherein the first region having a third region and a fourth region, the object corresponding to the one of the at least one of representative image, and the messages related to the object corresponding to the one of the at least one of representative image are displayed on the fourth region, wherein the display unit is adapted to support touch input, and the object corresponding to the one of the at least one of representative image output to the third region is changed to another object on the basis of touch input sensed in the third region, wherein the controller is adapted to group the detected at least one object corresponding to the representative image displayed on the second region according to at least one of specifications including a format of the detected at least one object, sending or receiving order, and a sender or receiver, and a change of the object corresponding to the one of the at least one of representative image output to the third region is made within the same group.