Objectives: This study identified types of working mothers with preschool children by the positive and negative perceptions of their mother’s roles and professional roles and examined the difference of each type in the psychological characteristics and the social support of their social network. Method: Data from 300 working mothers were analyzed. Results: Cluster analysis revealed three subgroups of working mothers; positive type, negative type, and ambivalence type of the perception about their roles. Cluster 1 ‘positive type’ was characterized as having high positive perception of a mother’s role, and average level professional role with low negative perceptions for their roles. They showed the highest life satisfaction, multi-role efficacy, social support, and the lowest depression and multi-role stress. Cluster 2 ‘negative type’ showed very low positive perception and high negative perception of their roles. They had the lowest life satisfaction, multi-role efficacy, social support, and the highest depression and multi-role stress. Cluster 3 ‘ambivalence type’ showed both high positive and negative perception of their roles at the same time. Their life satisfaction level is moderate with high multi-role efficacy, depression, multi-role stress, and high social support. Conclusions: Appropriate interventions are required according to the characteristics of each type.