The Numeracy Screener was developed by Dr. Nadia Nosworthy and Dr. Daniel Ansari at the Numerical Cognition Laboratory at Western University (Canada). This test is a brief (2 - 4minutes) screening tool of basic number and numerosity processing skills for children ages 5to 9 years. The goal of the present study was to establish a French version of the Numeracy Screener (NS-f), for which the translation is valid. For that purpose, a method of back-translation was used. The results showed a good correspondence (near 80 % adequation)between the original version and both retranslated versions. It thus suggests that the French version is valid. Preliminary results were also acquired and showed a coherence between scores on NS-f and the individual profiles of children. This study thus provided empirical support towards the standardization of the NS-f. This will allow, in the future, for further validity and reliability testing of the NS-f and the development of standardized norms with a tool adapted for the French-speaking population