Patent ID: 8251473

Claim:
An inkjet printing apparatus which ejects ink to a printing medium to perform printing on the printing medium, the apparatus comprising: a printing head that uses a pressure change by an application of an electric signal to eject the ink; a conductive member disposed in a region which faces the printing head; a voltage applier which applies a voltage to the conductive member for generating an electric field between the printing head and the conductive member; and a controller that causes the printing head to eject the ink onto the printing medium conveyed between the printing head and the conductive member, the electric field being generated therebetween by the voltage applier, wherein the voltage applied to the conductive member by the voltage applier when a first printing medium is used differs from the voltage applied to the conductive member by the voltage applier when a second printing medium thicker than the first printing medium is used, in a case where a distance between the printing head and the first printing medium and a distance between the printing head and the second printing medium are maintained at a predetermined distance.