An information display device which is capable of wireless reception is introduced, and the labels of a tray or a drug transporting vehicle can be freely re-written, and exceptional efficiency improvement is achieved. An information display device (50), wherein a display unit (51), an in-built electronic circuit (52), and a wireless receiving unit (53) are integrated, is installed in a tray (40). If drugs are available the drugs are inserted into the tray (40), but if drugs are out of stock, drug dispensers (22-25), which put out an out of stock information notification instead of inserting the drug, are made to face the conveyance path of a tray conveyance mechanism (11), and a written instruction, which displays the out of stock information (57) on the display unit (51) so as to be readable by visual observation, is wirelessly transmitted to the information display unit (50). Furthermore, separation information (58), which can separate the space inside the tray (40) into a planar arrangement of small containers (41-43), is visibly displayed on the display unit (51).
