To provide a printing controller which can carry out printing at a high speed with a high image quality and inexpensively, and to provide a printing controlling method.

A thermal head 2 consisting of a plurality of heating elements whose resistance value changes depending on a temperature is used. An initial temperature of each heating element 9 is detected on the basis of the resistance value of each heating element 9 for every dot, and an energy preliminarily determined corresponding to printing data is corrected on the basis of the detected initial temperature. Each heating element 9 is driven for heating on the basis of the corrected energy.