Liquid supply member and liquid discharge head

A liquid supply member comprising:

• a first member;
• a second member;
• and
• a damper member disposed between the first member and the second member,
• wherein the first member is a member configured to form a liquid chamber for storing a liquid to be supplied to a discharge port for discharging the liquid,
• wherein the damper member is a flexible member configured to form the liquid chamber together with the first member,
• wherein the second member is a member configured to form an atmosphere communication chamber communicating with an ambient atmosphere at a position between the damper member and the second member and opposing the liquid chamber with the damper member in between, and
• wherein a protrusion portion is formed on a surface of the second member facing the atmosphere communication chamber at a position corresponding to a central part of the damper member, the protrusion portion protruding toward the damper member beyond a connection surface between the damper member and the second member.