A liquid ejecting head comprising: a pressure chamber; an ejection port (11, 21, 23, 26, 28, 30) which is communicated with the pressure chamber; a flow path to which liquid flows in through an inflow path at one end of the flow path and from which the liquid flows out through an outflow path at the other end of the flow path, the pressure chamber and the ejection port (11, 21, 23, 26, 28, 30) being formed in an area between the one end and the other end of the flow path; an ejection port part (17, 22, 24, 27, 29, 31) communicating between the ejection port (11, 21, 23, 26, 28, 30) and the pressure chamber; and an ejection energy generating element for causing the liquid in the pressure chamber to be ejected from the ejection port (11, 21, 23, 26, 28, 30), wherein the ejection port (11, 21, 23, 26, 28, 30) includes a first ejection port disposed in an upstream side in an ejecting direction of liquid and a second ejection port (21, 23, 26, 28, 30) disposed in a downstream side in the ejecting direction, the ejection port part (17, 22, 24, 27, 29, 31) includes a first ejection port part disposed in an upstream side in the ejecting direction of liquid and communicating between the ejection port (11, 21, 23, 26, 28, 30) and the pressure chamber and a second ejection port part (22, 24, 27, 29, 31) disposed in a downstream side in the ejecting direction and communicating between the second ejection port (21, 23, 26, 28, 30) and the first ejection port, and the second ejection port (21, 23, 26, 28, 30) includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port, characterized in that in a case where the height of the flow path in an upstream side in a flowing direction with respect to a communication part between the flow path and the first ejection port part is H, the length of the first ejection port part communicating between the first ejection port and the pressure chamber in the ejecting direction is P, and the width of the first ejection port in a flow direction of liquid in the pressure chamber from the inflow path to the outflow path is W, the height H, the length P, and the width W satisfy a relation of: H − 0.34 × P − 0.66 × W > 1.7. a pressure chamber; an ejection port (11, 21, 23, 26, 28, 30) which is communicated with the pressure chamber; a flow path to which liquid flows in through an inflow path at one end of the flow path and from which the liquid flows out through an outflow path at the other end of the flow path, the pressure chamber and the ejection port (11, 21, 23, 26, 28, 30) being formed in an area between the one end and the other end of the flow path; an ejection port part (17, 22, 24, 27, 29, 31) communicating between the ejection port (11, 21, 23, 26, 28, 30) and the pressure chamber; and an ejection energy generating element for causing the liquid in the pressure chamber to be ejected from the ejection port (11, 21, 23, 26, 28, 30), wherein the ejection port (11, 21, 23, 26, 28, 30) includes a first ejection port disposed in an upstream side in an ejecting direction of liquid and a second ejection port (21, 23, 26, 28, 30) disposed in a downstream side in the ejecting direction, the ejection port part (17, 22, 24, 27, 29, 31) includes a first ejection port part disposed in an upstream side in the ejecting direction of liquid and communicating between the ejection port (11, 21, 23, 26, 28, 30) and the pressure chamber and a second ejection port part (22, 24, 27, 29, 31) disposed in a downstream side in the ejecting direction and communicating between the second ejection port (21, 23, 26, 28, 30) and the first ejection port, and the second ejection port (21, 23, 26, 28, 30) includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port, characterized in that in a case where the height of the flow path in an upstream side in a flowing direction with respect to a communication part between the flow path and the first ejection port part is H, the length of the first ejection port part communicating between the first ejection port and the pressure chamber in the ejecting direction is P, and the width of the first ejection port in a flow direction of liquid in the pressure chamber from the inflow path to the outflow path is W, the height H, the length P, and the width W satisfy a relation of: H − 0.34 × P − 0.66 × W > 1.7.