This study aimed to investigate how Korean EFL university students perceived their communication apprehension (CA) in English and what were the relationships among their CA, integrativeness, motivation to learn English, and self-evaluated English proficiency. The participants were 226 (92 male and 134 female) students enrolled in a university in Korea. Data were gathered by means of a questionnaire survey and semi-structured individual interviews. The results of the present study were as follows. (a) Students perceived themselves with slightly low-intermediate speaking proficiency, slightly high communication apprehension, fairly positive integrativeness and slightly high motivation to learn English; (b) No significant gender differences in self-evaluated English proficiency and in CA were found, while gender differences in integrativeness and motivation were significant. (c) CA has negative relationships with the affective factors investigated. Regression analyses further revealed that students` self-evaluated English speaking proficiency was the strongest predictor of their CA. Based on the survey results and the socio-educational model, the L2 communication model in the Korean EFL context was suggested. Several pedagogical strategies for responding to high CA students in the classroom were suggested.