The purpose of this study is to examine the process of promoting male parental leave in enterprises.Semi-structured interviews were conducted for 12 private enterprise promoting male parental leave. The verbal protocols for each participant were analyzed by Modified Grounded Theory Approach (M-GTA). As a result,59 concepts in 26 categories were created based on the data. The results are summarized as follows: (1)Enterprises that promote male parental leave position work-life balance as a management strategy. (2)Specific measures to promote male parental leave include formulating promotion rules and cultivating culture. (3)As a result of promoting male parental leave,results such as realization of worklife balance and strengthening organizational structure can be obtained.