Liquid ejection head and liquid ejection board

A liquid ejection head comprising lamination in an enumerated order of:

• an ejection port forming board including a plurality of ejection ports configured to eject a liquid;
• a pressure chamber forming board including a plurality of pressure chambers provided corresponding to the respective ejection ports and configured to contain the liquid to be ejected from the ejection ports;
• a liquid supplying board including
• a first common flow channel communicating with a first number of the pressure chambers in common, and
• a second common flow channel communicating with a second number of the pressure chambers in common, the second number being smaller than the first number;
• and
• a damper region forming board including
• a first damper region for reducing a pressure fluctuation in the first common flow channel, and
• a second damper region for reducing a pressure fluctuation in the second common flow channel, wherein
• the first damper region is larger than the second damper region.