A medicine packet inspecting apparatus is disclosed. The medicine packet inspecting apparatus includes a transfer conveyer installed on the upper surface of a main body to transfer medicine packets to one side of the main body, a tablet spreading unit installed on the upper surface of the transfer conveyer to uniformly spread tablets within the medicine packets, an image reading unit to capture the upper surfaces of the medicine packets with a camera and to judge whether or not the tablets are defective through comparison of the captured images with information regarding a prescription and the tablets stored in a data storage unit, and a making unit to mark a defective sign on medicine packets if the tablets within the medicine packets are judged to be defective.