The production method for a liquid ejection head is provided, in which a first head module is set, a second candidate head module is selected, a first representative value of the first head module is acquired, a second representative value of the second candidate head module is acquired, an average value of the first representative value and the second representative value is derived, and the second candidate head module by which the derived average value is 0.76-fold or more and 1.24-fold or less of an average ejection volume target value is set as a second head module.