PROBLEM TO BE SOLVED: To provide a thin-film transistor (TFT) having a high transparency, a method of manufacturing such thin-film transistor, and a display device using such thin-film transistor.SOLUTION: A thin-film transistor comprises: a thin-film transistor formation layer formed of silsesquioxane; and a thin-film transistor wiring formed on the thin-film transistor formation layer. In addition, a method of manufacturing the thin-film transistor includes the steps of: forming a sacrificial layer on a substrate; forming a thin-film transistor formation layer formed of silsesquioxane on the sacrificial layer; and forming a thin-film transistor wiring on the thin-film transistor formation layer.