<p>A sintered oxide containing In (element indium), Ga (element gallium) and Zn (element zinc), having a total content of In, Ga and Zn of 95 at.% or more relative to the total amount of elements contained in the sintered oxide excluding element oxygen, and comprising a compound that is represented by the formula: In2O3 and has a bixbyite structure and a compound that is represented by the formula: ZnGa2O4 and has a spinel structure.</p>
