head chips shown in FIGS. 11 and 12; FIG. 14 is a plan view showing a print head according to a fifth embodiment of the present invention, which corresponds to FIG. 3 of the first embodiment; FIG. 15 is a plan view showing a print head according to a sixth embodiment of the present invention, which corresponds to FIG. 3 of the first embodiment; FIG. 16 is a sectional view of FIG. 15 cut along line