An object-holding device, comprising: a container configured to store a liquid and having an upper opening for charging an object into the stored liquid; and a bottom wall; a plate having an upper surface and a lower surface and immersed into the liquid in a state in which the lower surface is spaced away from the bottom wall of the container, the plate including one or a plurality of holding portions arranged on the upper surface side and configured to carry the object; and a through hole formed at a position at which, the holding portion is arranged, and passing through the holding portion from the upper surface to the lower surface; and a dispersing mechanism configured to form, in the through hole, a liquid flow which flows from the lower surface side toward the upper surface side to raise the object carried on the holding portion; wherein the container includes: a tubular inner peripheral wall including an upper end portion configured to define the upper opening, and a lower end portion configured to hold a peripheral edge of the plate; and a tubular outer peripheral wall including an upper edge portion continuously provided to the inner peripheral wall and a lower edge portion continuously provided to the bottom wall; the inner peripheral wall, the outer peripheral wall, the bottom wall, and the plate form a closed region, and in a state in which the container stores the liquid so that a liquid surface of the liquid is positioned above the plate, the through hole is closed by the liquid retained on the plate such that the closed region becomes a sealed region; and the dispersing mechanism forms the liquid flow by generating a pressurization force to the liquid surface in the closed region; characterized in that the closed region is formed with a space in which air is retained; and the dispersing mechanism includes a pressure regulator configured to pressurize the space. a container configured to store a liquid and having an upper opening for charging an object into the stored liquid; and a bottom wall; a plate having an upper surface and a lower surface and immersed into the liquid in a state in which the lower surface is spaced away from the bottom wall of the container, the plate including one or a plurality of holding portions arranged on the upper surface side and configured to carry the object; and a through hole formed at a position at which, the holding portion is arranged, and passing through the holding portion from the upper surface to the lower surface; and a dispersing mechanism configured to form, in the through hole, a liquid flow which flows from the lower surface side toward the upper surface side to raise the object carried on the holding portion; wherein the container includes: a tubular inner peripheral wall including an upper end portion configured to define the upper opening, and a lower end portion configured to hold a peripheral edge of the plate; and a tubular outer peripheral wall including an upper edge portion continuously provided to the inner peripheral wall and a lower edge portion continuously provided to the bottom wall; the inner peripheral wall, the outer peripheral wall, the bottom wall, and the plate form a closed region, and in a state in which the container stores the liquid so that a liquid surface of the liquid is positioned above the plate, the through hole is closed by the liquid retained on the plate such that the closed region becomes a sealed region; and the dispersing mechanism forms the liquid flow by generating a pressurization force to the liquid surface in the closed region; a tubular inner peripheral wall including an upper end portion configured to define the upper opening, and a lower end portion configured to hold a peripheral edge of the plate; and a tubular outer peripheral wall including an upper edge portion continuously provided to the inner peripheral wall and a lower edge portion continuously provided to the bottom wall; the inner peripheral wall, the outer peripheral wall, the bottom wall, and the plate form a closed region, and in a state in which the container stores the liquid so that a liquid surface of the liquid is positioned above the plate, the through hole is closed by the liquid retained on the plate such that the closed region becomes a sealed region; and the dispersing mechanism forms the liquid flow by generating a pressurization force to the liquid surface in the closed region; characterized in that the closed region is formed with a space in which air is retained; and the dispersing mechanism includes a pressure regulator configured to pressurize the space.