A printing apparatus includes a thermal head and a processor. The thermal head prints an image on lines in a medium. The thermal head includes heat-generating elements to generate heat when a voltage is applied thereto in an application time, and the thermal head is controlled to sequentially on print each line. The processor is configured to: determine a specific line among lines based on printing data for printing lines, the specific line being a line estimated to have a possibility of sticking; and adjust the application time of an adjustment target line so as to be shorter than a reference application time, the adjustment target line having at least one line among lines, the at least one line being a line which is to be printed immediately before the specific line, the reference application time being set based on a temperature of the thermal head.