A liquid jet apparatus is provided. The liquid jet apparatus includes a nozzle plate which has a nozzle opening communicating with a pressure generation chamber; a flow channel substrate which has a liquid reservoir supplying a liquid to a plurality of pressure generation chambers; and a seal plate which covers at least a part of the liquid reservoir and which has a first damper chamber and second damper chamber. The seal plate has a connection cavity which connects the first damper chamber with the second damper chamber, and the connection cavity is connected to a release path communicating with the air.