Diarrheal diseases constitute a leading cause of morbidity and mortality among children in developing countries. One of the best methods of controlling diarrhoea is home treatment and mothers are the chief care givers for under-fives. Descriptive study was conducted to access the knowledge of mothers regarding the management of diarrhea among children in selected hospitals at kanpur city. Descriptive approach was used for the study. Data was collected from 60 mothers of under five children, selected from two hospitals in Kanpur City. Purposive sampling technique was adopted to select the mothers of under five children. Descriptive and inferential analyses were used for the analysis. The mean knowledge score of mothers of underfive was 25.83 with S.D 6.19. The overall knowledge score of mothers of underfive children were moderate. No significant association was found between knowledge score and with selected demographic variables at 0.05 level