An electronic device comprising: a first plate ; a second plate facing an opposite direction of the first plate ; and a side member attached to the second plate or integrally formed with the second plate, surrounding a space between the first plate and the second plate, and coupled to the first plate , wherein at least one electronic component is accommodated in the space, wherein the side member comprises: a first surface facing a rear surface of the first plate ; and a second surface being substantially perpendicular to the first surface and facing a side surface of the first plate , and characterized in that the first surface comprises: a protrusion protruding upwards from the first surface such that the first plate is substantially seated on the protrusion ; a first recess disposed between the protrusion and the second surface and formed in from the first surface by a first depth along a lengthwise direction of the side member ; and a second recess disposed between the protrusion and the second surface formed in from the first surface by a second depth along the lengthwise direction of the side member ; and wherein an adhesive material is applied to at least one of the first surface or the protrusion . a first plate ; a second plate facing an opposite direction of the first plate ; and a side member attached to the second plate or integrally formed with the second plate, surrounding a space between the first plate and the second plate, and coupled to the first plate , wherein at least one electronic component is accommodated in the space, wherein the side member comprises: a first surface facing a rear surface of the first plate ; and a second surface being substantially perpendicular to the first surface and facing a side surface of the first plate , and characterized in that a first surface facing a rear surface of the first plate ; and a second surface being substantially perpendicular to the first surface and facing a side surface of the first plate , and characterized in that the first surface comprises: a protrusion protruding upwards from the first surface such that the first plate is substantially seated on the protrusion ; a first recess disposed between the protrusion and the second surface and formed in from the first surface by a first depth along a lengthwise direction of the side member ; and a second recess disposed between the protrusion and the second surface formed in from the first surface by a second depth along the lengthwise direction of the side member ; and wherein an adhesive material is applied to at least one of the first surface or the protrusion . a protrusion protruding upwards from the first surface such that the first plate is substantially seated on the protrusion ; a first recess disposed between the protrusion and the second surface and formed in from the first surface by a first depth along a lengthwise direction of the side member ; and a second recess disposed between the protrusion and the second surface formed in from the first surface by a second depth along the lengthwise direction of the side member ; and wherein an adhesive material is applied to at least one of the first surface or the protrusion . <EOS>