This element substrate is an element substrate for a printhead which includes a plurality of printing elements to which a first
voltage is applied, a plurality of driving elements which drive the plurality of printing elements, a
logical circuit which outputs a driving
signal to control the plurality of driving elements, and a driving
voltage converter circuit which converts the
voltage of the driving
signal output from the
logical circuit into a second voltage lower than the first voltage and outputs the second voltage to the plurality of driving elements. The element substrate includes a driving voltage generating circuit which generates, on the basis of the first voltage, the second voltage to drive the driving
voltage converter circuit. The driving voltage generating circuit has a
constant current source for generating a
constant current based on the first voltage and generates the second voltage based on the
constant current.