This research is intended to know the level of students’ anxiety and identify possible factors to contribute the anxiety in English club. The researcher took a group of English club at Pondok Pesantren Roudlotul Muta’alimin Semarang in the academic year of 2022/2023. This research used a descriptive qualitative method with case study approach. The writer used two kinds of instruments to collect the data. The first instrument is Foreign Language Classroom Anxiety Scale questionnaire, developed by Horwitz et al. (1986). It consists of 33 items with 5 point Likert-Scale. The second instrument is the semi-structured interview. The result of this research showed that most of the students are at “Mildly Anxious” level without “Very Anxious” student. There are 8 (38,1%) students who experience “Anxious” level, 11 (52,3%) students are in “Mildly Anxious” level, 1 (4,8%) students have “Relaxed” level, and 1 (4,8%) student from 21 students is in “Very Relaxed” level. The results of this research show that from psychological aspect more than a half of students (52,3%) are in the level of moderate anxiety, 8 students (29%) are in the level of severe anxiety, and 2 students (9,6%) are in the level of mild anxiety. This research also showed that speaking in front of the class, being laughed at by others, incomprehensible input, students’ beliefs about language learning, teacher personality, and lack of preparation were the factors that may contribute to the students’ anxiety in learning English from eight anxious students were selected as the participants.