The study is conducted in Mekedla wereda took Tebi irrigation scheme as a case study, andrnthe main objective is to explore the role of access to irrigation on to household food securityrnthrough increasing production or food availability, increasing income or food accessibilityrnand improve the household daily food status and also identify challenges of irrigatedrnagriculture development of the study area. In order get sample households, a two stagernsampling producers was employed and select 150 sample households (i.e. 103 irrigation usersrnand 47 nonusers randomly and proportionally). The basic data used for the study were bothrnqualitative and quantitative ill nature and collected by using sample household survey, focusrngroup discussions alld key informants interview. Descriptive statistics were employed for datarnanalysis by using SPSS.rnIndicators that used to see the role of irrigated agriculture to households' food security werernhousehold's productivity, income; assets andfood consumption. The result of the study showsrnthat irrigation users are relatively better in their food security status as compared to nonusersrn(i.e. 74% of users and 52% of nonusers are food secure). More-over, irrigation users havernopportunity of producing high value crops and generating more income from market;rnaccesses to round year production that they can harvest at least twice a year and lowrnvulnerability of environmental risk particularly short and erratic rain condition. Regardingrnchallenges of the water resources development, the study is identified many constraintsrnillcluding management, economic and institutional. But lack of investment is one and mainrnchallenge of the development. At last, the study concluded that policy maker and otherrndevelopment partners must give attention and high priority in improving economic access ofrnresources like small scale irrigation to poor small scale households, which enable them outrnfrom the prison of poverty and food insecurity.