To reduce the number of parts and to facilitate handling by plurally arraying plural antennas obtained by integrally constituting the antennas for a low frequency element and a high frequency element on a substrate so that the positions of radiation parts of the respective antennas may be deviated.

In a composite element antenna 11, a low frequency element antenna 6' and a high frequency element antenna 7' are arranged on a substrate so that the position of the radiation part of them are not overlapped but deviated. In addition, a power feeding line for low frequency 2 arranged by bending to avoid contact with the power feeding line 4 and the radiation part 5 of the antenna 7'. The antenna 6' and the antenna 7' are integrally constituted as the antenna 11 on a single substrate 1 by separating an area of each without mutual superposing and contact of their constituting components. Consequently, as a two-frequency opening sharing array antenna, it is possible to constitute by arranging the same composite element antennas 10.