A device of this invention collectively manages a lot of articles which it crowded and was disposed, simply and precisely.A wireless tag collective reading device of this invention comprises a rack 21 to store the wireless-tag-equipped articles 22 which are mounted on the wireless-tag-equipped article by printing a chip portion and an antenna portion connected to the chip portion, the chip portion emitting tag information in response to electromagnetic waves, and an antenna unit 671 and 672 which applies, to the wireless-tag-equipped articles 22 stored in the rack 21, electromagnetic waves for the emission of the tag information, and receives electromagnetic waves for the tag information emitted from the wireless tag, wherein the device controls the directivity, intensity, and phase of the electromagnetic waves emitted from the antenna unit 671 and 672 to apply the electromagnetic waves to the wireless-tag-equipped article 22 at a given position stored in the rack 21, controls the relative positions of the antenna unit 671 and 672 and the rack 21, and reads the tag information from a signal received by the antenna unit 671 and 672.
