A survey of the bee genus Andrena Fabricius, 1775 was conducted between 2004 and 2011 in Turkey. A total of 2271 bee specimens, including 1721 females and 550 males, were identified at the subgenus and species level. As a result of morphological studies, 165 species belonging to 45 subgenera were identified. Subgenus of Truncandrena had the highest number of species observed in this survey. Two species were determined as a first record in Turkey. Geographical distribution of the species are given in Turkey. Common and rare species are assigned. Flight periods of the species are determined.