An apparatus of manufacturing a radiation detection panel , comprising: an evaporation source configured to evaporate a scintillator material and to emit the scintillator material vertically upward; a holding mechanism ; a heat conductor ; and a driving unit , characterized in that the holding mechanism is located vertically above the evaporation source , and configured to hold a photoelectric conversion substrate such that a deposition surface of the photoelectric conversion substrate is exposed to the evaporation source and inclined with respect to a vertical axis; the heat conductor is positioned through the holding mechanism and away from the photoelectric conversion substrate and arranged opposite to the holding mechanism with a gap; the driving unit is attached to the holding mechanism and configured to rotate the photoelectric conversion substrate with the holding mechanism ; the evaporation source includes an evaporation port through which the scintillator material is emitted; the holding mechanism is configured to hold the photoelectric conversion substrate such that 45° ≤ θ ≤ 70° is satisfied at a center of the deposition surface, where θ is an angle made inside between an imaginary line connecting a center of the evaporation port and an arbitrary point on the deposition surface, and a normal line of the deposition surface; the driving unit is configured to rotate the photoelectric conversion substrate with the holding mechanism by setting a rotation axis as an axis along a normal line of the center of the deposition surface; and the scintillator material contains cesium iodide (CsI) as a main component. an evaporation source configured to evaporate a scintillator material and to emit the scintillator material vertically upward; a holding mechanism ; a heat conductor ; and a driving unit , characterized in that the holding mechanism is located vertically above the evaporation source , and configured to hold a photoelectric conversion substrate such that a deposition surface of the photoelectric conversion substrate is exposed to the evaporation source and inclined with respect to a vertical axis; the heat conductor is positioned through the holding mechanism and away from the photoelectric conversion substrate and arranged opposite to the holding mechanism with a gap; the driving unit is attached to the holding mechanism and configured to rotate the photoelectric conversion substrate with the holding mechanism ; the evaporation source includes an evaporation port through which the scintillator material is emitted; the holding mechanism is configured to hold the photoelectric conversion substrate such that 45° ≤ θ ≤ 70° is satisfied at a center of the deposition surface, where θ is an angle made inside between an imaginary line connecting a center of the evaporation port and an arbitrary point on the deposition surface, and a normal line of the deposition surface; the driving unit is configured to rotate the photoelectric conversion substrate with the holding mechanism by setting a rotation axis as an axis along a normal line of the center of the deposition surface; and the scintillator material contains cesium iodide (CsI) as a main component. <EOS>