Objective The Hayling Sentence Completion Test (HSCT) measures prepotent response inhibition, useful to assess inhibition deficit in a variety of clinical conditions. Despite its extensive use by numerous clinical and research groups in France, normative data for the HSCT are not yet available for French speakers. Method A French version of the HCST was administered to a sample of 426 healthy community-dwelling French speaking adults (20-87 years of age). Normative data were calculated using a regression-based approach. Results Regression analyses indicated that both age and education were associated with response latency and number of errors in the inhibition condition. Equations to calculate Z scores are provided for clinical use. In addition, we provided a clear guideline for the error scoring of the inhibition condition by establishing a corpus of errors adjusted for the linguistic and cultural realities of the French population. Using this guideline, a good inter-rater reliability was observed. Because of the restricted ranges of response latency and number of errors in the automatic condition, the relationship between these scores and demographic factors was not explored. By consequence, no norms were proposed for this condition. Conclusions We provide normative data of a French version of the HSCT for adults and elderly patients. These normative data obtained will be extremely useful for clinical practice and research purposes.