Background: Integrated child development scheme represent one of the world’s largest and most unique programmes for early childhood development. The Integrated Child Development Scheme is a government initiative for the all round development of under 5 children. Its aim is to reduce infant mortality, child malnutrition, provide pre-school education, mid day meal programme, Balawadi and special nutrition. Aim: The aim of the study is to assess the knowledge regarding ICDS services among mothers of under five children residing in Aikkarnadu Gramma panchyath at Ernakulam district. Materials and Methods: A descriptive cross section survey design was adopted. The study was conducted on 128 mothers of under five children residing at Aikkaranadu Gramma Panchayath using convenient sampling technique. Data were collected by structured knowledge questionnaire and obtained data were analysed by descriptive and inferential statistics. Results: The knowledge score of mothers of under five revealed that 32 (41.0%) had good knowledge. 87 (67.0) had average knowledge regarding ICDS services. There is significant association between education [p <. 001] and knowledge on ICDS scheme [p < .009] with knowledge level of mothers of under five children regarding ICDS services.