Liquid ejecting head, head cartridge, and liquid ejecting and recording apparatus

A liquid ejecting bead comprising:

• an ejecting port for ejecting a liquid;
• a first liquid flow path communicating with said ejecting port for ejecting the liquid;
• an element substrate;
• a second liquid flow path corresponding to said first liquid flow path;
• a heating element, formed on said element substrate and located in said second liquid flow path, for forming a bubble in a bubble forming liquid in said second liquid flow path;
• a movable separation membrane for substantially separating said first liquid flow path and said second liquid flow path from each other at all times;
• and
• an atmosphere communication path for communicating said second liquid flow path with an atmosphere external to said liquid ejecting head, said atmosphere communication path having an atmosphere communication path introduction port on one end facing said second liquid flow path, and an atmosphere communication port on another end facing the atmosphere,
• wherein said atmosphere communication port and said ejecting port are located in the same surface,
• wherein said movable separation membrane has a movable portion, said movable portion separating a portion of said first liquid flow path and a portion of said second liquid flow path, said portions of said first and second liquid flow paths being separated only by said movable portion, and
• wherein said heating element faces said movable portion without facing said atmosphere communication path introduction port.