In this article we identified the Korean language competencies for lawyers was suggested through analyzing Legal Education Eligibility Test(LEET) and considering general competencies for lawyers. In addition we investigated validity of LEET with reference to washback effect for Korean language learning for would-be lawyers. Language comprehension area and logical writing area of current LEET have high validity enough to help would-be lawyers improve their reading and writing competence. But current Leet does not include test for oral communication competence. Besides, social science text have been too much emphasized. So oracy and literacy for various area need to be considered for the original intention of introducing LEET. As to current LEET and Korean language education for would-be lawyers we suggested two solutions: changes in LEET and subject development for would-be lawyers in the undergraduate and graduate course.