There are provided a fatigue crack growth curve estimation method, an estimation program, and an estimation device capable of strictly estimating the detail of the metal fatigue end and the crack growth detail. The diamine component can include 2,2\u2032-bisbenzidine, and the dianhydride component can include 3,3\u2032,4,4\u2032-biphenyltetracarboxylic dianhydride and 2,2-bis4-phenylpropane dianhydride. Furthermore, the flow amount distributor and the ejector are arranged in line in a longitudinal direction of the ejector.