Abstract: Family is a social group in the society consists of one or two parents and their children. This is influenced by the environment in which they are living. The children in the slum are unprivileged to enjoy good family atmosphere as well as the good environment due to various causes like inadequate access to safe water, inadequate access to sanitation and other infrastructure, poor structural quality housing, overcrowding, insecure residential status, the low socio – economic status of its residents, poverty in terms of culture and material, breeding ground for all social problems, lack of communication and educational facilities, lack of welfare agencies and services. So, the researcher has made an attempt to study the family environment of slum children in Tiruchirappalli. The aim of the study is to analyze the family environment of slum children, since family is the first socializing agent of the child.