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With regard to the important role of benthos invertebrates in aquatic ecosystems, the purpose of this research was to study about them in Gomishan wetland. The sampling was done by Ekman Grab from the sediments of the wetland bottom within 5 chosen stations for 12 continous months (from Esfand 1377 until Bahman 1378). The specimens were stained by Rose Bengal solvent and then were identified and counted in separate groups of macro-and meio-benthos. Among the macro-benthos, the highest density was observed in Pyrgula caspia species. After that, more density was seen respectively in Abra ovata, Cerastoderma sp., Balanus sp., Nereis diversicolar, Mytilaster lineatus and Dreissena sp. Among the meio-benthos, the highest density was seen in Foraminfera and then respectively in Ostracoda, Nematoda and Bivalve larvae. The indices of diversity and distribution were calculated and are given in this article.