The aim of this study is to investigate the relationship between family functioning and environmental attitudes toward the student’s environmental behaviours. This study was done in view of guiding both stakeholders and parents including school administrators on proper tips for boosting student behaviours towards the environment in order to build a more friendly and sustainable environment in Edo State and Nigeria as a nation. A correlational study was embarked on. The population and sample of the study consisted of all full time (200Level to 400Level) environmental education students in University of Benin, Nigeria. Thus one hundred and two students constituted the sample for the study. Hence a census sampling technique was utilized in the study. Family functioning was seen to have a stronger influence on the environmental behaviour of the students than their environmental attitude showed to the environment. Meanwhile the combination of family functioning and environmental attitude are seen to have a significant influence on the environmental behaviours of the students.