A three-dimensional modeling apparatus, comprising: a supply mechanism configured to supply a powder material; a deposition area in which the powder material supplied by the supply mechanism is deposited; a variable mechanism configured to vary a volume of the deposition area per a predetermined layer thickness so that the powder material is deposited per the predetermined layer thickness in the deposition area; a discharge mechanism configured to discharge liquid for forming a three-dimensional object to the powder material deposited per the predetermined layer thickness in the deposition area, the liquid being capable of hardening the powder material; and a control means for causing the discharge mechanism to discharge the liquid to the powder material, to thereby form a main body being an object being as a target to be modeled and a frame body being an object to be formed in a periphery of the main body, of the three-dimensional object, characterized in that the deposition area includes a first side, and a second side opposite to the first side, and the supply mechanism includes a supply box, which is arranged to be adjacent to the first side of the deposition area and is capable of storing the powder material, and a conveying mechanism configured to convey the powder material stored in the supply box in such a manner that the powder material is more deposited in an area closer to the first side rather than the second side in an entire area of the deposition area. a supply mechanism configured to supply a powder material; a deposition area in which the powder material supplied by the supply mechanism is deposited; a variable mechanism configured to vary a volume of the deposition area per a predetermined layer thickness so that the powder material is deposited per the predetermined layer thickness in the deposition area; a discharge mechanism configured to discharge liquid for forming a three-dimensional object to the powder material deposited per the predetermined layer thickness in the deposition area, the liquid being capable of hardening the powder material; and a control means for causing the discharge mechanism to discharge the liquid to the powder material, to thereby form a main body being an object being as a target to be modeled and a frame body being an object to be formed in a periphery of the main body, of the three-dimensional object, characterized in that the deposition area includes a first side, and a second side opposite to the first side, and the supply mechanism includes a supply box, which is arranged to be adjacent to the first side of the deposition area and is capable of storing the powder material, and a conveying mechanism configured to convey the powder material stored in the supply box in such a manner that the powder material is more deposited in an area closer to the first side rather than the second side in an entire area of the deposition area. a first side, and a second side opposite to the first side, and the supply mechanism includes a supply box, which is arranged to be adjacent to the first side of the deposition area and is capable of storing the powder material, and a conveying mechanism configured to convey the powder material stored in the supply box in such a manner that the powder material is more deposited in an area closer to the first side rather than the second side in an entire area of the deposition area.