A receiving unit (101) of a print data generating apparatus (100), which enables a printing that reflects user's preferences even in a digital broadcasting environment, receives and modulates digital broadcast waves. A video/data separating unit (102) separates a signal received from the receiving unit (101) into a video packet, an audio packet and a data packet that includes print information. A print information storing unit (104) is a RAM for storing print information, or the like, and reads the print information from the data packet received from the video/data separating unit (102), and stores it. A print information converting unit (108) reads the print information stored in the print information storing unit (104) and image data stored in an image storing unit (106), updates the print information by inserting, into the print information, image information representing the image data, based on the read-out print information and image data, and transmits the updated print information to a print information notifying unit (109). The print information notifying unit (109) transmits the received print information to a printing apparatus (120).