A mobile terminal device, comprising: a bracket comprising: a container-shaped first area in which a portion of a lower surface of the bracket is opened, the first area including at least one side wall protruding upward from the lower surface, a second area adjacent to the first area, and an internal circuit disposed at the inside of the lower surface and/or the at least one side wall in the first area of the bracket; a receiver mesh housed in the opened portion of the first area at a rear surface of the bracket; a main circuit board, PCB, housed in the second area and disposed upward by a predetermined gap from the lower surface of the bracket; a receiver provided in the first area of the bracket and separated by a predetermined gap from the main circuit board, the internal circuit being electrically connected to the receiver, the receiver comprising: an injection structure molded in the first area such as to leave the receiver mesh uncovered; a magnet comprising a groove, the magnet being mounted and fixed on the injection structure disposed in the first area, the magnet having an opening in line with the receiver mesh; a diaphragm fixed by a fixing member formed in an upper portion of the injection structure; and a coil fixed to the diaphragm and extended to face the groove of the magnet, wherein the diaphragm covers an upper portion of the receiver mesh, the magnet and the coil; and a contact portion (600, 1000) extended from the internal circuit to the main circuit board such that the internal circuit is electrically connected to the main circuit board. a bracket comprising: a container-shaped first area in which a portion of a lower surface of the bracket is opened, the first area including at least one side wall protruding upward from the lower surface, a second area adjacent to the first area, and an internal circuit disposed at the inside of the lower surface and/or the at least one side wall in the first area of the bracket; a receiver mesh housed in the opened portion of the first area at a rear surface of the bracket; a main circuit board, PCB, housed in the second area and disposed upward by a predetermined gap from the lower surface of the bracket; a receiver provided in the first area of the bracket and separated by a predetermined gap from the main circuit board, the internal circuit being electrically connected to the receiver, the receiver comprising: an injection structure molded in the first area such as to leave the receiver mesh uncovered; a magnet comprising a groove, the magnet being mounted and fixed on the injection structure disposed in the first area, the magnet having an opening in line with the receiver mesh; a diaphragm fixed by a fixing member formed in an upper portion of the injection structure; and a coil fixed to the diaphragm and extended to face the groove of the magnet, wherein the diaphragm covers an upper portion of the receiver mesh, the magnet and the coil; and an injection structure molded in the first area such as to leave the receiver mesh uncovered; a magnet comprising a groove, the magnet being mounted and fixed on the injection structure disposed in the first area, the magnet having an opening in line with the receiver mesh; a diaphragm fixed by a fixing member formed in an upper portion of the injection structure; and a coil fixed to the diaphragm and extended to face the groove of the magnet, wherein the diaphragm covers an upper portion of the receiver mesh, the magnet and the coil; and a contact portion (600, 1000) extended from the internal circuit to the main circuit board such that the internal circuit is electrically connected to the main circuit board.