This qualitative case study explored seven non-certified firms’ family-friendly cultures and their responses to the family-friendly certification through interviews with the human resources managers. The results from the data analysis revealed within firm’s differences and a gap among those firms. In addition, their responses to the family-friendly certification were classified into three categories: a positive group, indifference group, and negative group. From the results of the firms’ various family-friendly cultures and the firms’ various responses to the family-friendly certification, we suggested several issues on the family- friendly certification system’s improvement and the government’s management and supervision of the legal requirement to ensure workers’ work-life balance and the firm’s autonomy plan for its’ own family-friendly culture.