Abstract: A liquid discharge head includes: a nozzle plate having: a first nozzle; and a second nozzle, from each of which a liquid is dischargeable from a first face of the nozzle plate; a channel communicating with each of the first nozzle and the second nozzle, the channel on a second face opposite to the first face of the nozzle plate; multiple cylindrical protrusions having: a first cylindrical protrusion around the first nozzle and protruding continuously from an inner wall face of the first nozzle toward the channel, the first cylindrical protrusion having a first outer diameter; and a second cylindrical protrusion around the second nozzle and protruding continuously from an inner wall face of the second nozzle toward the channel, the second cylindrical protrusion having a second outer diameter larger than the first outer diameter of the first cylindrical protrusion.

Abstract: A liquid discharge module includes a nozzle plate, a housing, a valve, and a mover. The nozzle plate has a first face, a second face opposite to the first face, and a nozzle hole. The nozzle hole has at least two different inner diameters between the first face and the second face. The housing has a liquid chamber facing the first face of the nozzle plate and communicating with the nozzle hole. The housing supports the nozzle plate. The valve is disposed in the liquid chamber. The valve contacts the first face of the nozzle plate to form a sealed portion between the valve and the nozzle plate to close the nozzle hole. The mover moves the valve in a contact-separation direction between a contact position at which the valve contacts the nozzle plate and a separation position at which the valve is separated from the nozzle plate.