Purpose: This study aims to validate the Postpartum‐Specific‐Anxiety‐Scale (PSAS) as a French‐language instrument, which assesses maternal and infant‐related anxieties during the postpartum period. Design and Methods: The methodology included six stages: preliminary French translation; selection of most articulate items and back‐translation; rectification of discrepancies; pilot study (n = 257); reliability and validity studies (n = 258; n = 874); and test–retest reliability study (n = 231). Findings: The PSAS‐FR demonstrated good acceptability, high internal consistency of the global scale (Cronbach's α = 0.93), and each of the factors; along with good validity, and test–retest reliability. The receiver operating characteristic analysis suggested a satisfactory screening tool. Practice Implications: The PSAS‐FR appears to be a valid and reliable tool to screen for postpartum anxieties in the French‐speaking population.