Family is the important situation for the development of a person, and correlates with his or her mental health. The middle school student's family self-
concept reflects the cognition, understanding, and feeling of his or her own family. The Family Self-concept Questionnaire for Middle School Students was developed, using the data of 1428 participants. The results show that the family self-concept of the middle school student consists of family functioning, family climate, family status, family economics, and parent-child relationship. The Questionnaire includes 17 items with comprehensive facts, and has qualified reliability and validity.