Maladaptive daydreaming (MD) is a newly described mental disorder characterized by extensive mental fantasy activity featuring addiction-like longing for fantasizing, accompanying repetitive movement, and feeling hindered in everyday life. This study describes the first validation of a non-English version of the Maladaptive Daydreaming Scale (MDS) and provides additional evidence for MD as a clinical phenomenon. The Maladaptive Daydreaming Scale–Hebrew version (MDS-H) is an adaptation of the 14-item English MDS (Somer, Lehrfeld, Bigelsen, & Jopp, 2016), a self-report questionnaire developed on the basis of qualitative information provided by self-identified maladaptive daydreamers (MDers). The MDS-H was administered to 280 individuals aged 13 to 73 years, including 45 self-identified MDers. Findings confirmed the expected 3-factorial structure, scalar invariance in comparison to the English MDS validation sample, and good psychometric properties. MDS-H scores were associated with dissociation, obsessive-compulsive behavior, and attentiondeficit/hyperactivity. Given high sensitivity and specificity separating MDers and non-MDers, the MDS-H represents a useful tool to assess MD among Hebrew speakers, suggesting the relevance of MD in a non-English speaking culture, and highlighting the potential value of the MDS for world-wide investigation of this condition.