We provide the first annotated checklist of the Heteroptera (Insecta: Hemiptera) of the Site of Community Importance and Special Area of Conservation “Alpi Marittime” (IT1160056), based on literature records and unpublished material collected between 2012-2015 within two European projects in which the Alpi Marittime Nature Park was involved. The literature review provided a list of 62 species, recorded for the study area between 1884 and 1990, scattered in 14 papers. The new data here provided raise the total number of species occurring in this region to 208, grouped in 25 families and 135 genera. For each species reported in the catalogue, previous literature records, new data and the known distribution are provided. Among the most interesting findings, Salda henschii (Reuter, 1891) which was recently recorded for the first time in Italy, and Sternodontus obtususMulsant & Rey, 1856 which is rediscovered in the Piedmont region after more than a half century.