The present invention provides a wireless tag communication control
device, which includes a gate through which an object having attached
thereto a wireless tag passes, a sensor that is arranged at the gate and
senses the existence position of the object, an antenna that is arranged
at the gate and transmits an electric wave to the wireless tag, and an
electric wave output adjustment unit that is connected to the antenna,
wherein an electric wave transmission output from the antenna is adjusted
according to the position of the object in the gate.