The article discusses the results of the validation and psychometric parameters of the Polish-language version of the Fear of Being Single Scale (FBSS), originally developed by Spielmann and colleagues (2013). The study participants included 175 Polish respondents aged 18 to 67 (M = 27.19, SD = 8.63). The findings confirmed the one-dimensional structure of the Polish FBSS, convergent, discriminant and concurrent validity, reliability of the Polish FBSS, and its high test–retest reliability over a lag of six months. The obtained results make it possible to assess the Polish FBSS as a reliable and valid measure of fear of being single in a Polish non-clinical sample of adults.