The group most vulnerable to malnutrition and its adverse effects is children below five years, who constitute a special risk group in any population. Their nutritional requirement is disproportionately higher for body weight than older children and adults. There is strong evidence that malnutrition is associated with impaired growth, delayed mental development, poor school performance and reduced intellectual capacity. Thus even mild malnutrition in children can affect their long term intellectual ability, brain development and can predispose them to infections push them further into severe malnutrition. Hence based on above findings the present study was planned for Evaluation of Factors Responsible for the Malnourished Childrens Admitted to DMCH Darbhanga. The present study was planned in Department of Pediatrics, Darbhanga Medical College and Hospital, Laheriasarai Darbhanga, Bihar, India. The study was conducted from the March 2019 to July 2019. In the present study total 25 cases of the malnourished childrens were evaluated and discussed as below. Study was conducted with the help of pre-tested proforma. Each child was examined clinically &the important laboratory findings were noticed from the case sheet. Malnutrition was classified according to Indian academy of pediatrics (IAP) classification. This IAP classification based on weight-forage values. The standard used in this classification for reference population was the 50thcentile of Harvard standards. The data generated from the present study concludes that major epidemiological risk factors are Low birth weight, Low socio-economic status, illiteracy & low educational status among mothers, Improper breast feeding & complimentary feeding practice, Anemia during pregnancy in mothers, Improper birth spacing, high birth order., living in tribal, rural & urban slum areas. & the most of malnourished children were anaemic & suffering from diarrheal illness.