NOVELTY - Oxide sintered body (I) comprises: zinc (Zn), tin (Sn) and oxygen, where the tin at an atomic number ratio of Sn/(Zn+Sn) is 0.23-0.50, the oxide sintered body contains a zinc stannate compound including at least one of zinc stannate having a tin element as solid solution at the Zn site, zinc stannate introduced with oxygen deficit, and zinc stannate with a non-stoichiometric composition having a ratio of Sn/(Zn+Sn) that is a little deviated from that of zinc stannate.    USE - (I) is useful in oxide transparent conductive film (claimed), which is useful as solar batteries, liquid crystals, surface elements for organic electro luminescence and inorganic electro luminescence, or touch panels.    ADVANTAGE - The oxide transparent conductive film provides excellent chemical resistance, high transmittance in the visible light range. The method is simple, economical and provides high productivity.    DETAILED DESCRIPTION - Oxide sintered body (I) comprises: zinc (Zn), tin (Sn) and oxygen, where the tin at an atomic number ratio of Sn/(Zn+Sn) is 0.23-0.50, the oxide sintered body contains a zinc stannate compound including at least one of zinc stannate and having a tin element as solid solution at the Zn site, zinc stannate introduced with oxygen deficit, and zinc stannate with a non-stoichiometric composition having a ratio of Sn/(Zn+Sn) that is a little deviated from that of zinc stannate, and the oxide sintered body does not contain a detectable amount, by electron microprobe analysis, of a tin oxide crystal phase or a tin oxide crystal phase having zinc as a solid solution. INDEPENDENT CLAIMS are included for:    (1) manufacturing (I) comprising: formulating an aqueous solvent to raw material powder containing powder of a zinc stannate compound, or mixed powder of tin oxide powder and zinc oxide powder, and after mixing the resulting slurry for equal to longer than 15 hours, by subjecting the slurry to solid-liquid separation, drying and granulation, and subsequently compacting by charging the granule into a mold, followed by sintering the resultant compact under sintering atmosphere with an oxygen concentration, as volume ratio, of equal to or higher than 30%, at 1300-1500 degrees C for equal to or longer than 15 hours;    (2) a target obtainable by fabrication of the oxide sintered body;    (3) manufacturing an oxide transparent conductive film comprising forming a transparent thin film of an oxide onto a substrate using a sputtering method or an ion plating method; and    (4) an oxide transparent conductive film obtained by the method, and substantially (I).