A method for driving a droplet ejecting head, comprising: applying a driving signal to a pressure generation means to expand or contract a volume of a pressure chamber; applying pressure to liquid in the pressure chamber by driving the pressure generation means; and ejecting a droplet from a nozzle, wherein the driving signal includes a first driving signal for forming a large droplet by ejecting at least two droplets from the identical nozzle and combining them together mid-flight, the first driving signal includes: a first expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; a first contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time; a second expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; and a second contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time, in this order, and a pulse width of the first expansion pulse is greater than 2 AL and less than 4 AL (where AL is 1/2 an acoustic resonance period of a pressure wave in the pressure chamber); wherein the first contraction pulse continuously falls from the end of the fall of the first expansion pulse without a pause period; the second expansion pulse continuously rises from the end of the rise of the first contraction pulse without a pause period; and the second contraction pulse continuously falls from the end of the fall of the second expansion pulse without a pause period. applying a driving signal to a pressure generation means to expand or contract a volume of a pressure chamber; applying pressure to liquid in the pressure chamber by driving the pressure generation means; and ejecting a droplet from a nozzle, wherein the driving signal includes a first driving signal for forming a large droplet by ejecting at least two droplets from the identical nozzle and combining them together mid-flight, the first driving signal includes: a first expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; a first contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time; a second expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; and a second contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time, in this order, and a first expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; a first contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time; a second expansion pulse that expands the volume of the pressure chamber and contracts the volume of the pressure chamber after a certain period of time; and a second contraction pulse that contracts the volume of the pressure chamber and expands the volume of the pressure chamber after a certain period of time, in this order, and a pulse width of the first expansion pulse is greater than 2 AL and less than 4 AL (where AL is 1/2 an acoustic resonance period of a pressure wave in the pressure chamber); wherein the first contraction pulse continuously falls from the end of the fall of the first expansion pulse without a pause period; the second expansion pulse continuously rises from the end of the rise of the first contraction pulse without a pause period; and the second contraction pulse continuously falls from the end of the fall of the second expansion pulse without a pause period.