A liquid ejecting head comprising: a first supply port and a second supply port put apart from each other in a first direction and a third supply port situated between the first supply port and the second supply port in the first direction, the first, second and third supply port (4A, 4B, 4C) piercing through a substrate, a plurality of the first supply ports, a plurality of the second supply ports and a plurality of the third supply ports being arranged in a first supply port array (Lb-1), a second supply port array (Lb-2) and a third supply port array (Lc), respectively, these arrays (Lb-1, Lb-2, Lc) extending in a second direction crossing the first direction; and a first ejection port array (La-1) of first ejection ports arrayed in the second direction and situated between the first supply port array (Lb-1) and the third supply port array (Lc) with respect to the first direction, and a second ejection port array (La-2) of second ejection ports arrayed in the second direction and situated between the second supply port array (Lb-2) and the third supply port array (Lc) with respect to the first direction, liquid supplied from the first, second and third supply ports (4A, 4B, 4C) being ejected through the first and second ejection ports, characterised in that each of the third supply ports includes a first portion (wc) situated on the side of the first ejection port with respect to the first direction, a second portion (wc) situated on the side of the second ejection port with respect to the first direction and a third portion (wf) situated between the first portion (wc) and the second portion (wc), and the first portion (wc) and the second portion (wc) are greater than the third portion (wf) in a dimension (hc, hf) as measured in the second direction. a first supply port and a second supply port put apart from each other in a first direction and a third supply port situated between the first supply port and the second supply port in the first direction, the first, second and third supply port (4A, 4B, 4C) piercing through a substrate, a plurality of the first supply ports, a plurality of the second supply ports and a plurality of the third supply ports being arranged in a first supply port array (Lb-1), a second supply port array (Lb-2) and a third supply port array (Lc), respectively, these arrays (Lb-1, Lb-2, Lc) extending in a second direction crossing the first direction; and a first ejection port array (La-1) of first ejection ports arrayed in the second direction and situated between the first supply port array (Lb-1) and the third supply port array (Lc) with respect to the first direction, and a second ejection port array (La-2) of second ejection ports arrayed in the second direction and situated between the second supply port array (Lb-2) and the third supply port array (Lc) with respect to the first direction, liquid supplied from the first, second and third supply ports (4A, 4B, 4C) being ejected through the first and second ejection ports, characterised in that each of the third supply ports includes a first portion (wc) situated on the side of the first ejection port with respect to the first direction, a second portion (wc) situated on the side of the second ejection port with respect to the first direction and a third portion (wf) situated between the first portion (wc) and the second portion (wc), and the first portion (wc) and the second portion (wc) are greater than the third portion (wf) in a dimension (hc, hf) as measured in the second direction.