The mobile communication terminal includes a case, a display unit, an antenna element having a feeding point for receiving electric power near an end, and a substrate. A plate-like member is disposed so as to be in close to or in contact with the end where the antenna element of the mobile communication terminal is disposed to be close thereto. The plate-like member may be a case cover. The plate-like member includes a long coupling element which has a length of about λ/2 or more with respect to a communication wavelength λ and stored in the plate-like member. When one end of the case of the mobile communication terminal is placed near the coupling element, the antenna element and the coupling element can be capacitively coupled to each other, so that radiation power in a specific direction is increased, and thus, a directivity gain is improved.