An electronic device comprising: a housing comprising: a front plate facing a first direction, a rear plate facing a second direction opposite to the first direction, and a lateral member surrounding a space between the front plate and the rear plate and at least partially constructed of a metal material, and comprising a mounting portion constructed along an edge; a display comprising a display module coupled to the front plate , and mounted to the front plate so that at least part thereof is viewable through the front plate; and a bonding structure attached between the mounting portion and the front plate to seal an inner portion of the housing, wherein the bonding structure comprises a first adhesive material applied along the mounting portion, and when viewed from above the front plate, the first adhesive material is applied such that a width of the first adhesive material applied to a mounting portion in a corner region of the housing is variable, compared to a width of the first adhesive material applied to a mounting portion in at least one non-corner region of the housing, wherein the first adhesive material is applied to each of first and second mounting portions in both corner portions of the housing adjacent to a flexible printed circuit board of the display, characterised in that the first adhesive material is allocated to each of the first and second mounting portions in two lines, and when viewed from above the front plate, comprises at least one closed-curve shape having an inner space to which a second adhesive material different from the first adhesive material is applied and filled, the second adhesive material comprising a wet curing adhesive liquid. a front plate facing a first direction, a rear plate facing a second direction opposite to the first direction, and a lateral member surrounding a space between the front plate and the rear plate and at least partially constructed of a metal material, and comprising a mounting portion constructed along an edge; a display comprising a display module coupled to the front plate , and mounted to the front plate so that at least part thereof is viewable through the front plate; and a bonding structure attached between the mounting portion and the front plate to seal an inner portion of the housing, wherein the bonding structure comprises a first adhesive material applied along the mounting portion, and when viewed from above the front plate, the first adhesive material is applied such that a width of the first adhesive material applied to a mounting portion in a corner region of the housing is variable, compared to a width of the first adhesive material applied to a mounting portion in at least one non-corner region of the housing, wherein the first adhesive material is applied to each of first and second mounting portions in both corner portions of the housing adjacent to a flexible printed circuit board of the display, characterised in that the first adhesive material is allocated to each of the first and second mounting portions in two lines, and when viewed from above the front plate, comprises at least one closed-curve shape having an inner space to which a second adhesive material different from the first adhesive material is applied and filled, the second adhesive material comprising a wet curing adhesive liquid. <EOS>