Background <p>Anxiety is become a common disorder during pregnancy. The Pregnancy-related Anxiety Scale (PrAS) is a common tool for assess pregnancy anxiety. However, not yet validated in Indonesia. This study aimed to evaluate the psychometric properties of the PrAS in Indonesia.</p> Methods <p>A cross-sectional study was conducted among 92 pregnant women attending a Public Health Center in Indonesia. Content validity was assessed using the Content Validity Index (CVI) and Content Validity Ratio (CVR), evaluating item relevance and inter-rater agreement. Construct validity was examined through Confirmatory Factor Analysis (CFA) to determine the underlying factor structure of the Pregnancy-Related Anxiety Scale (PrAS).</p> Results <p>The mean age of pregnant women who participated was 29.12 years (SD = 4.85) with their pregnancy age mean 28 weeks. The content validity using CVI shows that 29 of 32 items are valued 1.00, the same score produced on the CVR. Indicating only 3 items need to be reviewed or revised. Regarding the construct validity, the final model of the PrAS was 7 dimensions which initially formed 8 dimensions. Although the Chi-square (χ2) index was not a good fit (df = 370, p-value = 0.0001) this multidimensional model fits the data supported by the index of Root Mean Square Error of Approximation (RMSEA) estimate was 0.058. Followed by the Comparative Fit Index (CFI) and the Tucker-Lewis Index (TLI) were 0.978 and 0.976 respectively, meaning that the goodness of fit indices were obtained. This pilot study results in a valid instrument of the Pregnancy-Related Anxiety Scale (PrAS).</p> Conclusions <p>The Indonesian version of the PrAS is a valid tool for screening and assessing Indonesian women’s pregnancy-related anxiety.</p>