PROBLEM TO BE SOLVED: To provide a structure capable of holding a curve shape without continuously applying differential pressure, a manufacturing method of a resin structure used for manufacturing of the structure, and an X-ray imaging device including the structure.SOLUTION: A manufacturing method of a resin structure includes: a first step in which resin 2 is filled in a metal mold 1； a second step in which a first support substrate 3 is fixed onto the resin filled in the metal mold； a third step in which the resin filled in the metal mold is hardened； a fourth step in which a second support substrate 5 is fixed onto the first support substrate； a fifth step in which the resin is released from the metal mold by using the second support substrate； and a sixth step in which the first support substrate and the second support substrate are separated after release.【課題】圧力差をかけ続けなくても湾曲形状を保持できる構造体とその構造体の製造に用いる樹脂構造体の製造方法、及び、その構造体を備えるＸ線撮像装置を提供する。【解決手段】樹脂構造体の製造方法は、金型１に樹脂２を充填する第１の工程と、金型に充填された樹脂上に第１の支持基板３を固定する第２の工程と、金型に充填された樹脂を硬化させる第３の工程と、第１の支持基板上に第２の支持基板５を固定する第４の工程と、第２の支持基板を用いて、樹脂を金型から離型する第５の工程と、離型後に第１の支持基板と前記第２の支持基板とを分離する第６の工程と、を有する。【選択図】図１
