This study aims to examine the changing roles of social workers after launching public guardianship(PG) for individuals with psychiatric disabilities(IPD) in 2017 and its implications for social work education. In order to address these purposes, focus group interviews were done with specific focuses on the experience of 16 social workers participated in PG services for IPD. Major results are summarized as follows. Participants reported three role categories involving primary care-takers, case managers, and advocators with 15 sub-themes. The role of primary care-taker turned out to be a new role generated by the newly launched public guardianship services. Although the roles of case managers and advocators are similar to the traditional social workers’roles, the spectrums of detailed roles are much more expanded and diverse, increasing burnout risks of public guardian social workers. Regardless of the burnout risk due to the dramatic expansions of burden, there are very few opportunities for guardianship education. Based on these results, implications for future directions of social work education to develop a sustainable public guardianship system for IPD.