An electronic device (1, 2) comprising: a display; a glass member comprising a base portion disposed on a front surface of the display and an intensity reinforcing portion having a size smaller than the size of the base portion and protruding forward from the base portion; a touch sensor provided at the front of the glass member; a main board disposed on a rear surface of the display; a flexible circuit, having a first portion and a second portion extending therefrom, configured to transmit an electric signal between the touch sensor and the main board; a first waterproof member having an inner edge surrounding and in contact with an outer edge of the intensity reinforcing portion, the first waterproof member being elastically deformable, and a portion of an outer surface of the first waterproof member contacting an inner surface of the first portion of the flexible circuit; a second waterproof member having an inner edge surrounding and in contact with the outer edge of the first waterproof member, the second waterproof member being elastically deformable, and a portion of the inner surface of the second waterproof member contacting an outer surface of the first portion of the flexible circuit; and a case (200; 210, 220) comprising an insertion hole into which the touch sensor is inserted, the case surrounding and in contact with an outer edge of the second waterproof member, and the case accommodating the main board, the display, and the glass member that are disposed in the case; wherein the base portion has a size larger than the size of the insertion hole; wherein the first portion of the flexible circuit extends between the first and second waterproof members, and the second portion of the flexible circuit extends between the front of the base portion and the rear of the second waterproof member; and wherein the first and second waterproof members are elastically deformed under pressure between the case and the intensity reinforcing portion in a direction approaching the first portion of the flexible circuit therebetween, so that they conform elastically to the shape of the first portion. a display; a glass member comprising a base portion disposed on a front surface of the display and an intensity reinforcing portion having a size smaller than the size of the base portion and protruding forward from the base portion; a touch sensor provided at the front of the glass member; a main board disposed on a rear surface of the display; a flexible circuit, having a first portion and a second portion extending therefrom, configured to transmit an electric signal between the touch sensor and the main board; a first waterproof member having an inner edge surrounding and in contact with an outer edge of the intensity reinforcing portion, the first waterproof member being elastically deformable, and a portion of an outer surface of the first waterproof member contacting an inner surface of the first portion of the flexible circuit; a second waterproof member having an inner edge surrounding and in contact with the outer edge of the first waterproof member, the second waterproof member being elastically deformable, and a portion of the inner surface of the second waterproof member contacting an outer surface of the first portion of the flexible circuit; and a case (200; 210, 220) comprising an insertion hole into which the touch sensor is inserted, the case surrounding and in contact with an outer edge of the second waterproof member, and the case accommodating the main board, the display, and the glass member that are disposed in the case; wherein the base portion has a size larger than the size of the insertion hole; wherein the first portion of the flexible circuit extends between the first and second waterproof members, and the second portion of the flexible circuit extends between the front of the base portion and the rear of the second waterproof member; and wherein the first and second waterproof members are elastically deformed under pressure between the case and the intensity reinforcing portion in a direction approaching the first portion of the flexible circuit therebetween, so that they conform elastically to the shape of the first portion.