PROBLEM TO BE SOLVED: To provide a production method of a leaf vegetable capable of maintaining original flavor of the vegetable even after being preserved.SOLUTION: A production method of a packed leaf vegetable has steps for: applying a liquid contact treatment with an organic acid salt solution to a leaf vegetable; applying a liquid contact treatment thereto with an alkaline solution; and then applying a cleaning treatment to the liquid contact-treated leaf vegetable; in which the organic acid salt solution contains an organic acid salt as much as 0.01% or more and 5% or less, and the alkaline solution contains egg-shell burned calcium and has pH of 9-13.SELECTED DRAWING: None