To obtain a phased array antenna device in which the number of data signal lines is not changed even when the number of arrays of transmitting/receiving modules is increased, so that the weight, current consumption, heat generation and the like are suppressed.

The phased array antenna device is equipped with one X data signal line 5 wired between a beam controller 3 and a phased array antenna opening 2 for transferring an X-direction component of beam scan data to a plurality of transmitting/receiving modules 1, and one Y data signal line 6 wired between the beam controller 3 and the phased array antenna opening 2 for transferring a Y-direction component of the beam scan data to the plurality of transmitting/receiving modules 1. The number of wiring between the beam controller 3 and the phased array antenna opening 2 is just two of the one X data signal line 5 and the one Y data signal line 6, so that the number of wiring in the entire phased array antenna device can be reduced. Further, even when the number of arrays of the transmitting/receiving modules 1 is increased, the number of wiring is not increased, thereby suppressing weight, current consumption, heat generation and the like.