This book aims to contribute the Turkish version of the Foreign Language Classroom Anxiety Scale (FLCAS) to education in Turkey. Due to the fact that the original language of this scale is English, it is a handicap for the researcher to use it in his / her studies since to understand and answer this scale; the participants should be capable of understanding items in English. This study contains the research on the validity, reliability, and the language equivalence of the Turkish version of FLCAS. 353 participants of students from Yildiz Technical University Basic English department were administered for this study.