An introduction to true bugs fauna of Gunber valley including two new records for Iranian fauna (Hemiptera: Heteroptera)Abstract : Gunber region, in East Azarbayjan province was surveyed for aquatic and terrestrial Heteroptera between May 2008 and September 2009. Forty two species belonging to 33 genera and 14 families were collected. Among these species Anthocoris nemorum (Linnaeus, 1761), Nabis pseudoferus pseudoferus Romane, 1949, Orius niger (Wolff, 1811), Orius horvathi (Reuter, 1884), Geocoris arenarius (Jakovlev, 1867), Geocoris megacephalus (Rossi, 1790), Velia affinis Kolenati, 1857, Gerris maculatus Tamanini, 1946, Gerris lateralis Schummel, 1832 are predators. The Species belonging to Miridae were the most conspicuous and reversely the members of Stenocephalidae had the minimum frequency. All of the species are new for the Gunber region, Stenodema calcarata (Fallén, 1807) and Globiceps flavomaculatus (Fabricius, 1794) belonging to family Miridae are new records to the Iran Heteroptera fauna.