This study develops a multicultural efficacy measure and examines the validation of the measure to turn out many excellent social welfare professionals with multicultural practice competence. Korean Cultural Competence Measure(??) (33 items) was modified to construct a multicultural efficacy measure for social welfare students. Exploratory and confirmatory factor analysis were conducted with cross-validation analysis of 511 cases. The result of measure validation analysis confirms the multicultural efficacy measure that consists of four component factors and 28 items: multicultural attitude efficacy (11 items), multicultural knowledge efficacy (6 items), multicultural skill efficacy (7 items), multicultural awareness efficacy (4 items).