In recent days, the improvement of communicative competence is increasingly stressed in English education sector, and the number of native English-speaking teachers is on the rise. In fact, however, there have been few careful efforts to find out the effects of English instruction by native instructors. The purpose of this study was to examine the effects of instruction by native instructors on anxiety and risk-taking. In this study, how the two kinds of instruction would affect the English-speaking anxiety and risk-taking of learners was investigated as well, since the two were viewed as integral affective variables linked to communicative competence acquisition. As a few domestic earlier studies had catered to elementary and secondary students, this study focused on university students.