A pale giant oak aphid Stomaphis wojciechowskii Depa, 2012 from the tribe Stomaphidini (Hemiptera: Aphididae: Lachninae) is recorded for the fauna of Belarus for the first time. The species was collected twice in October 2019 and 2020 in the vicinity of Gomel from deep bark cracks and in the ant tunnels of Lasius brunneus under the bark of Quercus robur in a deciduous forest. Currently Stomaphis wojciechowskii is recorded from open deciduous and mixed forests in Poland, Hungary, Romania, Slovakia, Slovenia and Great Britain. Apparently, this species previously remained unrecognized due to its external similarity to S. quercus (Linnaeus, 1758) and cryptic mode of life. The morphological description of the studied forms is given. Brief information on the lifestyle, distribution and bionomics of this species is given.