A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.