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A checklist of Iranian Cryptinae (Hymenoptera: Ichneumonidae) for all species recorded of Iran is given. The list is based on detailed studies of all available published data and some new collected samples. Until now 123 species in 42 genera belonging to 3 tribes of this subfamily have been known from Iran. Cryptinae is the most species-rich subfamilies of Ichneumonidae, and has a worldwide distribution. Two genera, Goryphus Holmgren, 1868 and Thaumatogelis Schwarz, 1995 were recorded for the first time for the Iranian fauna. Many parts of the country are still studied insufficiently or even not studied at all, so we suppose that the total species richness in Iran is essentially higher.