In 2018 and 2019, 14 driving cores and 20 hand drillings were carried out to reconstruct the Holocene deposition history of the Loosbach valley at Pestenacker, an UNESCO world heritage site of Late Neolithic wetland occupation. A hand-held Cobra Pro (Atlas Copco) driving core drilling system and 60 mm diameter open corer recovered sediments. The achieved segments of each 1 m lengths were accessed on site towards sediment features and colours according to AG Boden (2005) and Munsell Colour Chart. The geochemical findings were classified into sedimentological units. The detailed descriptions of the geochemical data are given in the document „Geochemical data of recovered cores from the Loosbach valley at Pestenacker“.