The paper presents facies development and lithostratigraphy of the mid-Cretaceous Zabijak Formation in the Polish part of the Tatra Mountains. Reference is also made to all known occurrences of the formation in the Slovak part of the Tatra. Geological maps, general and detailed sections, and representative selection of rock samples (Figs 1-60) as well as panoramic photographs of the formation outcrops (Pls 1-17) give insight into the distribution, facies, sedimentary features, lithostratigraphic units, and tectonic position of the mid-Cretaceous sequence in the Tatra Mts. The Zabijak Formation embraces the youngest sedimentary sequence occurring in the Mesozoic Hightatric Succession. It rests disconformably upon various units of the Lower Cretaceous substratum, and is cut discordantly by the Hightatric and/or Subtatric overthrusts. There are three main sedimentary facies in the formation: (1) the limestone facies; (2) the marly facies; and (3) the marly-silty-sandy (flysch-type) facies. They record three consequent stages in the mid-Cretaceous history of the Hightatric sedimentary basin: (1) submerged carbonate platform with prevailing non-depositional conditions and/or condensed sedimentation (Early to Late Albian); and two basinal stages: (2) hemipelagic marly basin with increasing-upwards input of fine terrigenous material (Late Albian through Cenomanian); and (3) marly distal flysch basin with considerable input of fine terrigenous material (?Early Turonian). The Zabijak Formation is subdivided into three superimposed members (new units): (1) the Żeleźniak Member, (2) the Kamienne Member, and (3) the Pisana Member, that correspond to the three main facies of the formation. Five units of bed rank (new units) are defined as well in the basal part of the formation: (1) the Ku Stawku Bed(s), (2) the Wielka Rówień Bed, (3) the Spady Bed, (4) the Upłazkowa Bed, and (5) the Mułowy Beds. The former two represent condensed limestone facies and infillings of cavities and dykes in the direct substratum, whereas the latter three embrace basal conglomeratic and sandy deposits of the overlying Kamienne Member.