A row of V-shaped grooves is formed in the bottom of each of imaging trays which temporarily hold a dose of drug. After drugs are inserted into the imaging tray, the imaging tray is vibrated to remove the overlap between the drugs corresponding to a dose and to correct the posture of the drugs using a first inclined surface and a second inclined surface of the V-shaped groove. Two cameras are provided so as to face the first inclined surface and the second inclined surface of the V-shaped groove, respectively, and capture the images of the drugs which have stable postures that have been corrected on the V-shaped grooves, in two directions. The first and second images of the drugs captured in two directions are processed to accurately acquire drug information including at least outward appearance information of the drugs.
