PROBLEM TO BE SOLVED: To provide a technology capable of improving the collection efficiency of defective products in a tablet printing apparatus for printing on the surface of tablets. SOLUTION: This tablet printing apparatus 1 has a transport mechanism for transporting while sucking and holding a tablet 9 by applying a negative pressure to a plurality of suction portions, a head 42 for ejecting ink droplets on the surface of the tablet 9, and a head. By applying a positive pressure to the camera 55 arranged on the downstream side of 42, the defective product determination unit that determines the target tablet to be collected based on the image captured by the camera 55, and the suction unit that holds the target tablet. First blow mechanisms 611 and 621 that release the suction of the tablets 9, a discharge sensor 63 that detects whether or not the tablets 9 are present in the suction portion, and a residual tablet is determined based on a detection signal from the discharge sensor 63. And a second blow mechanism 641 for canceling the adsorption of the residual tablets. As a result, even if the defective products are not collected by the first blow mechanisms 611 and 621, the efficiency of collecting defective products can be improved. [Selection diagram] Fig. 3【課題】錠剤の表面に印刷を行う錠剤印刷装置において、不良品の回収効率を向上できる技術を提供する。【解決手段】この錠剤印刷装置１は、複数の吸着部に負圧を作用させて錠剤９を吸着保持しつつ搬送する搬送機構と、錠剤９の表面にインク滴を吐出するヘッド４２と、ヘッド４２の下流側に配置されるカメラ５５と、カメラ５５の撮像した画像に基づいて回収すべき対象錠剤を決定する不良品判定部と、対象錠剤が保持される吸着部に陽圧を作用させて錠剤９の吸着を解除する第１ブロー機構６１１，６２１と、吸着部に錠剤９が存在しているか否かを検知する排出センサ６３と、排出センサ６３からの検知信号に基づいて残留錠剤を判別する残留判定部と、残留錠剤の吸着を解除する第２ブロー機構６４１とを有する。これにより、万が一、第１ブロー機構６１１，６２１による不良品の回収が行われなかった場合であっても、不良品の回収効率を向上できる。【選択図】図３
