To stabilize a characteristic of ink ejection and to optimize a density of a nozzle.

An electrothermal transducer element 21 having a small surface area for high density recording is provided on a nozzle 11 having a width W1 for high density recording. A first electrothermal transducer element 21 for high density recording and a second electrothermal transducer element 22 having a large surface area for low density recording is provided on a nozzle 12 having a width W2 greater than the width W1 for both of high density recording and low density recording. The nozzles 11 and nozzles 12 are alternately arranged at an identical pitch P.