This study aims investigate the degree of foreign language teaching anxiety between in-service and pre-service primary English teachers and to provide pedagogical suggestions for lowing such anxiety. In order to answer these questions, 32 in-service primary English teachers in Gangwon province and 34 pre-service student-teachers at C national university of education participated in this study and an online survey questionnaire was distributed for data analysis. The results are revealed as follows. First, the survey illustrated that the pre-service English teachers’ degree of foreign language teaching anxiety was higher than its counterpart. Second, both in-service primary English teachers and pre-service teachers showed a higher anxiety degree when teaching productive skills rather than receptive ones. Third, both groups expressed that a sense of anxiety tends to arise due to the gaze of their learners, parents, colleagues, and co-native English teachers. Fourth, deficient pronunciation and intonation, along with improper grammar and difficulty in communicating with native English teachers were described as one of the causes of anxiety. Fifth, the in-service group had a concern about their current English proficiency in teaching English which would lead in turn a sense of confidence decline.