Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head comprising:

• a flow path member in which a first substrate and a second substrate are joined to each other by an adhesive so that flow paths extending in directions along a junction surface between the first substrate and the second substrate are formed;
• and
• an ejection unit that ejects from nozzles liquids introduced from the flow path member,
• wherein the flow paths include a first flow path through which a first liquid flows and a second flow path through which a second liquid different from the first liquid flows, and
• wherein a ratio of presence of a flow path between a demarcation wall that at least partially forms the first flow path and an external contour of the flow path member in the directions along the junction surfaces is greater than a ratio of presence of a flow path between a demarcation wall that at least partially forms the second flow path and the external contour of the flow path member.