The dataset contains list of macrobenthic taxa collected with grab samples from Franz Josef Land archipelago in Summer-Autumn 2020 and 2021 (Van-Veen or Okean-0.1 benthic grabs with a capture area of 0.1 m2) with wet biomass for each species. Sampling was conducted during the RV Ivan Petrov expeditions. A total of 65 benthic grab stations were studied. All specimens of macrobenthos have been counted and weighted (wet biomass) with reported accuracy to 0.01 g. Bivalve molluscs and gastropods were weighted in shells. All taxonomic names have been standardised using the World Register of Marine Species (WoRMS).