- Student Union S²(S Square) with total floor space of about 4,290㎡ has 5 floors and includes various facilities for student life, as it serve as the stronghold of all student activities including autonomous activities and research.
Student Union Facilities by Floor
- 1F: Disabled Student Support Center, Small Theater, Club Rooms
- 2F: Student Association Office, College Student Association Rooms, Seminar Room, Sungshin Change Volunteers, Club Room, Student Welfare Committee, Self-Service Cafeteria
- 3F: Campus Newspaper Editorial Office, Chapel, Club Room, Seminar Room, Global Seminar Room, Self-Service Cafeteria
- 4F: General Club Room (for associate, new clubs), Sungshin Women's University Press, Self-Service Cafeteria (Powder Room)
- 5F: FORUS, SEBS, Sungshin Mirror