Printing apparatus, printing method, and program therefor

A printing apparatus which enables a user to verify a tape information at any selected time, including immediately before printing, thereby optimizing printing processes, and also prevents performing printing contrary to the intentions of the user, caused by, for example, cartridge mounting mistakes. Further, a technology for controlling the printing apparatus is also provided. A printing apparatus 1 for printing a printing data on a tape is provided with a tape identification sensor 142 for detecting the width of a tape mounted in the printing apparatus 1 , an operating portion 11 for setting a tape width setting value that is reflected in the printing data, and a display 306 that outputs the tape width information in a state that is recognizable to a user before printing commences, and after the tape width information is output, the operating portion 11 accepts a user's operation for designating execution of printing that reflects the tape width setting value or cancellation of the printing designation.