An ink jet printing apparatus and a print head recovery method are provided which effectively execute a preliminary ejection to eject ink not contributing to image printing from nozzle opening of the print head to maintain the ink ejection performance in good condition. Also, the present invention provides a size restoring device having holders on a baseboard. First space portions widen toward a first direction from the wires to the wire drawing pads and are located between adjacent ones of the wire drawing pads in a connection region between the wires and the wire drawing pads. Using the etching blocking film as an etching stopper, the interlayer insulating film is etched and the exposed etching blocking film is subsequently etched. Each voltage control unit I equipped with a magnetic switch for detecting when they are in contact with the electrode.