An electronic device comprising: a housing including a first surface facing in a first direction, a second surface facing in a second direction opposite the first direction, and a side member surrounding at least a portion of a space between the first surface and the second surface; an inner structure positioned between the first surface and the second surface; a conductive coil positioned inside the housing, the conductive coil having an axis substantially perpendicular to the first direction or the second direction, and being wound around one portion of the inner structure; a communication circuit positioned inside the housing, the communication circuit being configured to cause the conductive coil to generate a magnetic flux; a display exposed through at least a portion of the first surface; and a processor positioned inside the housing, the processor being electrically connected to the communication circuit and the display, wherein the second surface comprises a first portion which is formed of a conductive material and includes two openings (624, 625) separated from each other, a second portion which is formed of a non-conductive material and fills one of the two openings, and a third portion which is formed of a non-conductive material and fills another of the two openings; wherein the conductive coil is positioned under the first portion when viewed from above the second surface; and wherein the inner structure extends between the two openings (624, 625) when viewed from above the second surface, and enables the generated magnetic flux to penetrate through the two openings (624, 625); and wherein the electronic device further comprises: a battery, wherein the battery comprises a first battery portion and a second battery portion which is positioned lower than the first battery portion when viewed from above the second surface; wherein the inner structure comprises a first metal plate that is positioned between the first battery portion and the second surface; wherein an end portion of the first metal plate is bent downward and positioned above the second battery portion when viewed from above the second surface; and wherein the conductive coil is wound around the end portion of the first metal plate. a housing including a first surface facing in a first direction, a second surface facing in a second direction opposite the first direction, and a side member surrounding at least a portion of a space between the first surface and the second surface; an inner structure positioned between the first surface and the second surface; a conductive coil positioned inside the housing, the conductive coil having an axis substantially perpendicular to the first direction or the second direction, and being wound around one portion of the inner structure; a communication circuit positioned inside the housing, the communication circuit being configured to cause the conductive coil to generate a magnetic flux; a display exposed through at least a portion of the first surface; and a processor positioned inside the housing, the processor being electrically connected to the communication circuit and the display, wherein the second surface comprises a first portion which is formed of a conductive material and includes two openings (624, 625) separated from each other, a second portion which is formed of a non-conductive material and fills one of the two openings, and a third portion which is formed of a non-conductive material and fills another of the two openings; wherein the conductive coil is positioned under the first portion when viewed from above the second surface; and wherein the inner structure extends between the two openings (624, 625) when viewed from above the second surface, and enables the generated magnetic flux to penetrate through the two openings (624, 625); and wherein the electronic device further comprises: a battery, wherein the battery comprises a first battery portion and a second battery portion which is positioned lower than the first battery portion when viewed from above the second surface; wherein the inner structure comprises a first metal plate that is positioned between the first battery portion and the second surface; wherein an end portion of the first metal plate is bent downward and positioned above the second battery portion when viewed from above the second surface; and wherein the conductive coil is wound around the end portion of the first metal plate. a battery, wherein the battery comprises a first battery portion and a second battery portion which is positioned lower than the first battery portion when viewed from above the second surface; wherein the inner structure comprises a first metal plate that is positioned between the first battery portion and the second surface; wherein an end portion of the first metal plate is bent downward and positioned above the second battery portion when viewed from above the second surface; and wherein the conductive coil is wound around the end portion of the first metal plate.