Quality communication between a teacher and a student or students contributes to the process of learning not only a foreign language. Contrarily, fear of communication can significantly harm communication. The present study provides information on the process and results of scale adaptation, which measures foreign language anxiety (Horwitz, Horwitz & Cope, 1986). The process of adaptation to Czech conditions included the verification of content validity, construct validity, and the identification of a factor structure of the instrument. Based on the results of the exploratory factor analysis in the STATISTICA 13.3 program, a reduction from thirty-three to thirteen items was proposed. The internal consistency of the adapted Foreign Language Classroom Anxiety Scale showed a sufficient Cronbach's alpha coefficient of 0.82.