The aim of the study is to assess the prevalence and type of co–morbid psychiatric illness in migraine and to assess the relationship between the severity and disability of migraine to psychiatric illness. The sample comprises of 60 consecutive patients attending the neurology OPD, Government Rajaji Hospital, Madurai, a tertiary care center for a period of 6 months, who were diagnosed to have migraine by the IHS( International Headache Society) criteria by a neurologist and age group between 18–65yrs were taken up for the study. Minimum duration of illness is 3 months.  Mini International Neuropsychiatirc interview, Migraine disability assessment questionnaire (MIDAS) and Migraine Severity Questionaire (MIGSEV) were used.  The present research found that, Migraine is more common in females (Females have high prevalence of co–morbid psychiatric disorders than males).  Anxiety was the most common psychiatric disorder followed by depression.  Co–morbid psychiatric illness increases the migraine severity and increases the disability in migraine.