This submission contains shallow seismic reflection data acquired in Adventfjorden, Svalbard, during survey campaigns conducted in 2008, 2016, and 2022. The datasets comprise high-resolution sub-bottom profiler data obtained using boomer, chirp, and parametric (Innomar) acoustic systems. The 2008 boomer survey, conducted using a 136A GeoPulse sub-bottom profiler, provides fjord-wide coverage of shallow subsurface stratigraphy. The 2016 chirp survey, acquired using an EdgeTech 2000-CSS system, focuses on the inner fjord and the delta fan of the Adventelva, offering detailed imaging of sedimentary layering. The 2022 parametric survey, acquired using an Innomar deep-36 system, covers the central fjord axis and provides very high-resolution imaging of subsurface structures. All data are provided in SEG-Y format, with navigation data (UTM coordinates) stored in the trace headers, specified by byte locations in the accompanying metadata file. Acquisition parameters, file structure, and additional processing information are documented in detail in the provided metadata tables. The datasets are used in a study investigating Late Holocene sedimentary and morphodynamic responses to climatic variability in Adventfjorden, which is currently under submission in Marine Geology. The seismic data enable the identification of depositional structures, including sediment waves, and are used to investigate turbiditic flow dynamic responses in this high-Arctic fjord environment.