A microphone module comprising: a window for a display unit or for protection of a camera module or a Light Emitting Diode module having at least one microphone hole in a part of an edge of the window; and a microphone installed in a position corresponding to the microphone hole of the window, wherein the microphone module receives an external voice through the microphone hole of the window wherein the window comprises a transparent glass material or a transparent synthetic resin material wherein the microphone module further comprises a bracket interposed between the window and the microphone, wherein the bracket comprises a first surface for installing the microphone, a second surface facing the first surface and getting in surface contact with an inner surface of the window, a through-hole passing from a position in which the microphone of the first surface is installed, to the second surface, a wave guide groove provided to communicate from the through-hole to the microphone hole, and a slit of a constant depth and a constant length provided in a position corresponding to the wave guide groove in the inner surface of the window, wherein the microphone is mounted and fixed to a fixing housing installed in an installation groove provided in the first surface of the bracket, and wherein a separate sealing member is further attached to a top of the fixing housing, and wherein the sealing member comprises: a plate type body covering the microphone installed in the fixing housing; a bending end extending and bent at one side of the plate type body; and a protrusion formed at an end of the bending end and, when the window and a case frame of the electronic device are coupled with each other, connecting the microphone hole of the window with the wave guide groove of the bracket. a window for a display unit or for protection of a camera module or a Light Emitting Diode module having at least one microphone hole in a part of an edge of the window; and a microphone installed in a position corresponding to the microphone hole of the window, wherein the microphone module receives an external voice through the microphone hole of the window wherein the window comprises a transparent glass material or a transparent synthetic resin material wherein the microphone module further comprises a bracket interposed between the window and the microphone, wherein the bracket comprises a first surface for installing the microphone, a second surface facing the first surface and getting in surface contact with an inner surface of the window, a through-hole passing from a position in which the microphone of the first surface is installed, to the second surface, a wave guide groove provided to communicate from the through-hole to the microphone hole, and a slit of a constant depth and a constant length provided in a position corresponding to the wave guide groove in the inner surface of the window, wherein the microphone is mounted and fixed to a fixing housing installed in an installation groove provided in the first surface of the bracket, and wherein a separate sealing member is further attached to a top of the fixing housing, and wherein the sealing member comprises: a plate type body covering the microphone installed in the fixing housing; a bending end extending and bent at one side of the plate type body; and a protrusion formed at an end of the bending end and, when the window and a case frame of the electronic device are coupled with each other, connecting the microphone hole of the window with the wave guide groove of the bracket.