Provided is a technology for more easily evaluating stretch flange cracking at a sheared end face of an evaluation metal sheet. A method includes reference strain gradient information (10c) acquired by performing a forming analysis of a hole expansion test on a randomly selected second metal sheet under predetermined forming conditions and converting a hole expansion ratio to a strain at a hole edge composed of true strain, the information (10c) being a relationship between the strain at the hole edge and a strain gradient along a radial direction, and two or more pieces of the information (10c) being included by changing the forming conditions. Hole expansion forming is performed on the evaluation metal sheet under the same forming conditions as respective forming conditions corresponding to at least two pieces of the reference strain gradient information (10c) to obtain at least two limit hole expansion ratios at a hole expansion limit of the evaluation metal sheet. A formable region (ARA) of the evaluation metal sheet is obtained from the at least two pieces of the reference strain gradient information (10c) and the obtained at least two limit hole expansion ratios at the hole expansion limit. Stretch flange cracking at the sheared end face of the evaluation metal sheet is evaluated by the obtained formable region (ARA).