BACKGROUND As per NFHS-4 data under 5 mortality in India is 50 and infant mortality rate is 41. Globally, neonatal deaths account for 41% of mortality in children under 5 years of age, rate that has been increasing over recent years. Hypothermia is an important cause of death in low birth weight (LBW) babies. 1 Neonatal hypothermia, defined as an abnormally low body temperature of under 36.5*C is a risk factor for newborn survival. The essential care of LBW includes maintenance of warmth to prevent hypothermia. Hypothermia is considered as a silent killer. 2 Infants born small or prematurely are recognized as needing more intense thermal protection. 3 Apart from intrinsic problems in LBW neonate, the thermal control in them is greatly influenced by knowledge and practice of caregivers specifically mother. 4 Objective-While hypothermia has long been recognized as a potential threat to newborn survival in resource-limited settings, it has not received sufficient attention. So there is a need of assessing the knowledge of mothers of LBW babies on prevention of hypothermia and to provide them the knowledge of cost effective thermal protection measures. A very few studies have been made in our institution SNCU which caters a good number of LBW neonate from south Odisha. MATERIALS AND METHODS It is a cross-sectional study using pre-tested, pre-structured questionnaire. 54 mothers having LBW babies admitted to SNCU of MKCG Medical College were included in study. Descriptive analytical statistics applied. RESULTS Out of 54 mothers 57% were from rural area, residing in nuclear family were 59%. Mothers attended hospital for confinement were 95% and 85% started breast feeding their babies. Only 44% had knowledge of keeping the baby warm by immediately wiping the baby. But no mother had knowledge of Kangaroo Mother Care (KMC). CONCLUSION However, simple strategies such as skin-to-skin care are not consistently practiced by many of mothers. Mothers still need more knowledge to prevent the baby from heat loss.