ABSTRACT Traditional small-scale irrigation is undertaken by smallholder farmers using low levels of technology that, they can operate and maintain effectively. It is not just a static and timeless activity, but a dynamic process that varies from place to place. The present practices of irrigation technology encompass both traditional knowledge and modern techniques. This book tells the contribution of traditional small scale irrigation to household food security in South eastern low land of Ethiopia. Household food balance model and food consumption Score were used to analyze the contribution of tradition small scale to household food security. The analysis of these two food security indicators showed that irrigation user households were relatively more food secure than rain fed farmers.