The purpose of the present invention is to provide a tablet printing device that makes it possible to print predetermined identification information along the direction of a mark such as a cleavage line on the front surface and the rear surface of a tablet. In this tablet printing device, the directions of a cleavage line T1 on the surface of each tablet T is identified by using a first imaging unit 101 to capture an image of one surface of a tablet T and using a second imaging unit 102 to capture an image of the other surface of the tablet T in an upstream-side conveyance unit 3. A first printing unit 201 in the upstream-side conveyance unit 3 prints predetermined identification information along the direction of the cleavage line T1 on the other surface of the tablet T on the basis of image data for the one surface and the other surface of the tablet T captured by the first imaging unit 101 and the second imaging unit 102. A second printing unit 202 in a downstream-side conveyance unit 4 prints predetermined identification information along the direction of the cleavage line T1 on the one surface of the tablet T on the basis of the image data for the one surface and the other surface of the tablet T captured by the first imaging unit 101 and the second imaging unit 102.La présente invention concerne un dispositif dimpression sur comprimé qui permet dimprimer des informations didentification prédéterminées le long dune marque telle quune ligne de clivage sur la surface avant et la surface arrière dun comprimé. Dans ce dispositif dimpression sur comprimé, les directions dune ligne de clivage T1 sur la surface de chaque comprimé T sont identifiées en utilisant une première unité dimagerie 101 pour capturer une image dune surface dun comprimé T et en utilisant une seconde unité dimagerie 102 pour capturer une image de lautre surface du comprimé T dans une unité de transport 3 côté amont. Une première unité dimpression 201 dans lunité de transport 3 côté amont imprime
