A printing apparatus includes a thermal head and a processor. The thermal head has heat-generating elements and prints on a plurality of lines in a medium in setting periods. The processor sets a second period within each setting period. The second period is a time period for adjusting a temperature change of the heat-generating elements without printing, after a first period for printing. The processor determines a nth line (n: an integer of 1 or greater) among the lines based on printing data for printing the image. The nth line is a line estimated to have a possibility of sticking on the medium by the thermal head. The processor adjusts a temperature change of at least a part of the heat-generating elements in the second periods corresponding to at least the nth line and a (n+1)th line, to suppress the sticking.