a liquid ejection apparatus includes a liquid ejection head that ejects a liquid and a switching device . the switching device includes a first on - off valve that selectively opens and closes a first supply passage at a position upstream from the joining point , and a second on - off valve that selectively opens and closes a second supply passage at a position upstream from the joining point . when the first on - off valve is open and the second on - off valve is closed , the liquid guide portion divides the first liquid into a first liquid flow proceeding from the first supply passage directly to the head supply passage and a second liquid flow flowing from the first supply passage into the head supply passage after passing the vicinity of the second on - off valve in the second supply passage . when the first on - off valve is closed and the second on - off valve is open , the liquid guide portion divides the second liquid into a third liquid flow proceeding from the second supply passage directly to the head supply passage and a fourth liquid flow flowing from the second supply passage into the head supply passage after passing the vicinity of the first on - off valve in the first supply passage .