Liquid ejecting head unhand liquid ejecting apparatus

A liquid ejecting head unit comprising:

• a plurality of nozzles for ejecting a liquid;
• a first circuit substrate and a second circuit substrate for ejecting the liquid from the nozzles;
• a first drive unit, a second drive unit, a third drive unit, and a fourth drive unit, each of which has a part of the plurality of nozzles;
• wherein the plurality of nozzles are positioned at either of a first portion, a second portion and a third portion, each of the first portion, the second portion and the third portion having at least one of nozzles out of the plurality of nozzles,
• wherein the first portion has a first width in a first direction,
• wherein the second portion has a second width in the first direction, the second width is smaller than the first width,
• wherein the third portion has a third width in the first direction, the third width is smaller than the first width,
• wherein the first portion is positioned between the second portion and the third portion in a second direction that is orthogonal to the first direction,
• wherein the first circuit substrate is positioned in the first portion and the second portion in the second direction,
• wherein the second circuit substrate is positioned in at least one of the first portion and the third portion in the second direction,
• wherein the first drive unit is connected to the first circuit substrate and is positioned in the first portion and the second portion in the second direction,
• wherein the second drive unit is connected to the second circuit substrate and is positioned in at least one of the first portion and the third portion in the second direction,
• wherein the third drive unit is connected to the first circuit substrate and is positioned in the first portion in the second direction, and
• wherein the fourth drive unit is connected to the second circuit substrate and is positioned in the first portion in the second direction.