Attention Deficit Hyperactivity Disorder (ADHD) is a common neuro developmental disorder in children. Most common comorbidity is Disruptive behaviour disorder. Family and social environmental factors are not considered as having etiological role but may exacerbate pre-existing symptoms and genetic or neurological vulnerability. These children are particularly challenging and require intensive intervention to prevent greater morbidity and impairment. This study aims to see whether family adversity is related to ADHD with Conduct disorder. This case –control, cross sectional study was done in a child Guidance clinic of Psychiatry department of R.G Kar Medical College, Kolkata. Children diagnosed as ADHD with co morbid DBD fulfilling the inclusion and exclusion criteria were selected as cases (N=32). Control population was collected from schools of both rural and urban areas who did not have any psychiatric disorder (N =62). The consenting parents of the cases and control were interviewed with a standardized questionnaire named Family Environmental scale (F.E.S). Significant differences were found in all variables. The control group family has shown more cohesion, more acceptance and caring, more expressiveness, more independence, more family organisation and control, enjoyed more active recreational orientation but less family conflict. The cases, ADHD with co morbid ODD or CD have shown high family conflict.