According to one embodiment, a tablet printing apparatus includes: a conveyor configured to convey tablets sequentially supplied thereto while sucking and holding the tablets by a suction chamber 14； a print head located to face the conveyor and configured to elect ink to the tablet conveyed by the conveyor to perform printing； and partition walls 144, 144 and suction paths 1421, 1422 that serve as a suction force adjusting device configured to reduce a suction force applied to the tablet at a conveyance position facing the print head to be lower than a suction force applied to the tablet at conveyance positions in front of and behind the conveyance position.
