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The research objectives were (1) to determine the ability of managerial primary school principals in Waingapu City, East Sumba district, (2) to prove the influence of the headmaster managerial ability to the attainment of school programs, especially at the primary school in the district of Kota Waingapu, East Sumba district. There are 30 principals as total samples. Data analysis uses linear multiple regression revealing that (1) the success of the primary schools program in the district of Waingapu City, East Sumba are significantly influenced by of the headmaster’s coordination abilities and headmaster surveillance capabilities variables. (2) The success of the primary schools program in the district of Waingapu City, East Sumba is not significantly influenced by the headmaster’s ability to plan and organizing capability variables.