A portable communication device comprising: a housing including: a plate forming at least a portion of a back surface of the portable communication device, and a conductive portion forming at least a portion of a side surface of the portable communication device; a display accommodated in the housing and viewable through a front surface of the portable communication device; a non-conductive member placed between the display and the plate; and an antenna structure (601, 602) comprising one or more antennas (232, 234, 236, 238) formed to face the non-conductive member, wherein a surface of the non-conductive member includes: a first partial region of a surface of the non-conductive member, which faces the antenna structure (601, 602), a second partial region of the surface of the non-conductive member formed adjacent to the first partial region, which faces the antenna structure (601, 602), and a separating wall (613b, 614b, 615b, 616b) of the surface of the non-conductive member placed between the first partial region and the second partial region; wherein at least a portion of the non-conductive member is placed between the antenna structure (601, 602) and the side surface; and wherein the first partial region is configured such that a progress path of a radio frequency signal radiated from the one or more antennas (232, 234, 236, 238) is changed when passing through the first partial region. a housing including: a plate forming at least a portion of a back surface of the portable communication device, and a conductive portion forming at least a portion of a side surface of the portable communication device; a plate forming at least a portion of a back surface of the portable communication device, and a conductive portion forming at least a portion of a side surface of the portable communication device; a display accommodated in the housing and viewable through a front surface of the portable communication device; a non-conductive member placed between the display and the plate; and an antenna structure (601, 602) comprising one or more antennas (232, 234, 236, 238) formed to face the non-conductive member, wherein a surface of the non-conductive member includes: a first partial region of a surface of the non-conductive member, which faces the antenna structure (601, 602), a second partial region of the surface of the non-conductive member formed adjacent to the first partial region, which faces the antenna structure (601, 602), and a separating wall (613b, 614b, 615b, 616b) of the surface of the non-conductive member placed between the first partial region and the second partial region; wherein at least a portion of the non-conductive member is placed between the antenna structure (601, 602) and the side surface; and wherein the first partial region is configured such that a progress path of a radio frequency signal radiated from the one or more antennas (232, 234, 236, 238) is changed when passing through the first partial region. a first partial region of a surface of the non-conductive member, which faces the antenna structure (601, 602), a second partial region of the surface of the non-conductive member formed adjacent to the first partial region, which faces the antenna structure (601, 602), and a separating wall (613b, 614b, 615b, 616b) of the surface of the non-conductive member placed between the first partial region and the second partial region; wherein at least a portion of the non-conductive member is placed between the antenna structure (601, 602) and the side surface; and wherein the first partial region is configured such that a progress path of a radio frequency signal radiated from the one or more antennas (232, 234, 236, 238) is changed when passing through the first partial region.