A checklist of the grasshoppers (Orthoptera, Acridomorpha) collected during the expedition “Our Planet Reviewed” in 2015 to the Mitaraka Massif, French Guiana, is provided. Out of the 142 species of Acridomorpha known from this region, 23 species belonging to 22 genera, five families and nine subfamilies of Acridomorpha were registered herein. Additionally, Schistocerca pallens (Thunberg, 1815) and Trybliophorus sulcatus Descamps, 1981 were registered for the first time. An updated list of all the Acridomorpha recorded from French Guiana is also provided.