A liquid ejection head removably attached to a recording apparatus, in which a liquid is circulated between the recording apparatus and the liquid ejection head, wherein the liquid ejection head comprises: a liquid ejection portion configured to eject the liquid; and a liquid supplying member including a first face having a first connecting portion fluidly connected to the recording apparatus, a second face that is a back face of the first face and has a second connecting portion fluidly connected to the liquid ejection portion, and an interior channel communicating the first connecting portion and the second connecting portion, the liquid supplying member supplying a liquid from the recording apparatus to the liquid ejection portion, wherein the interior channel includes, for a flow of the liquid from the first connecting portion to the second connecting portion, a portion extending toward the first face and a portion extending toward the second face, and the interior channel includes a first liquid supplying channel extending along the first face, a second liquid supplying channel extending along the second face, a first connecting channel formed by the portion extending toward the first face communicating the first connecting portion and the second liquid supplying channel and extending in a direction intersecting the first face, characterised in that the liquid ejection head further comprises a second connecting channel formed by the portion extending toward the second face communicating the second liquid supplying channel and the first liquid supplying channel and extending in a direction intersecting the first face, and a third connecting channel communicating the first liquid supplying channel and the second connecting portion and extending in a direction intersecting the first face. a liquid ejection portion configured to eject the liquid; and a liquid supplying member including a first face having a first connecting portion fluidly connected to the recording apparatus, a second face that is a back face of the first face and has a second connecting portion fluidly connected to the liquid ejection portion, and an interior channel communicating the first connecting portion and the second connecting portion, the liquid supplying member supplying a liquid from the recording apparatus to the liquid ejection portion, wherein the interior channel includes, for a flow of the liquid from the first connecting portion to the second connecting portion, a portion extending toward the first face and a portion extending toward the second face, and the interior channel includes a first liquid supplying channel extending along the first face, a second liquid supplying channel extending along the second face, a first connecting channel formed by the portion extending toward the first face communicating the first connecting portion and the second liquid supplying channel and extending in a direction intersecting the first face, characterised in that the liquid ejection head further comprises a second connecting channel formed by the portion extending toward the second face communicating the second liquid supplying channel and the first liquid supplying channel and extending in a direction intersecting the first face, and a third connecting channel communicating the first liquid supplying channel and the second connecting portion and extending in a direction intersecting the first face.