The present invention provides a manufacturing tank from which a three-dimensional manufacturing product manufactured in the three-dimensional manufacturing device can be taken out inside the three-dimensional manufacturing device. In a three-dimensional manufacturing device for manufacturing three-dimensional manufacturing products by layering a powder material and applying a binding agent on the layered powder material to solidify same, the manufacturing tank (31) for manufacturing the three-dimensional manufacturing product is formed by providing a manufacturing table (30) on which the powder material is layered and a cylinder (C) for raising and lowering the manufacturing table (30) therein. The cylinder (C) is furnished with a rectangular frame (38), four posts (39) projecting from the four corners of the frame (38), and four outer walls (37) provided between the posts (39). The four outer walls (37) are attached to the free end of the posts (39) by a pivot provided on an end of the surfaces facing the posts (39) and are configured so that after a three-dimensional manufacturing product has been manufactured inside the manufacturing tank (31), the three-dimensional manufacturing product can be taken out by opening the four outer walls (37) outward centered on the pivots.
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