A three-dimensional shaping apparatus for repeatedly performing operations for ejecting, onto a shaping plate, a model material and a supporting material as shaping materials while performing scanning at least in a single direction, and for curing the materials to form slices having a predetermined thickness in a height direction, and laminating these slices in the height direction for performing shaping, the model material being to form a final shaped object, and the supporting material being to support a protruding portion of the model material and to be finally removed, the three-dimensional shaping apparatus comprising: the shaping plate for placing a shaped object thereon; a shaping-material ejection device including a plurality of model-material ejection nozzles for ejecting the model material and a plurality of supporting-material ejection nozzles for ejecting the supporting material, such that these pluralities of nozzles are arranged in a single direction; a curing device for curing the model material and the supporting material; a head portion including the shaping-material ejection device and the curing device; a horizontal driving device for reciprocatingly scanning the head portion in a horizontal direction; a vertical driving device for moving positions of the head portion and the shaping plate with respect to each other in the height direction; and a control device for controlling driving of the horizontal driving device and the vertical driving device and for controlling the ejection by the shaping-material ejection device and the curing by the curing device, wherein the control device being configured to control for causing the horizontal driving device to reciprocatingly scan the head portion in a single direction, further causing the shaping-material ejection device to eject the model material and the supporting material onto the shaping plate and causing the curing device to cure the model material and/or the supporting material at least in one of forward and rearward paths during the reciprocating scanning to form the slices, further for moving the positions of the shaping plate and the head portion with respect to each other in the height direction, and for repeating lamination of the slices to perform shaping, the supporting material is provided, on an outer surface thereof, with a supporting shell made of a material different from that of the supporting material, and the supporting shell is made of a material having higher rigidity than that of the supporting material, wherein the supporting shell is partially provided with an exposing portion at which the supporting material is exposed, and wherein the control device is adapted to control the shaping-material ejection device such that the model material is ejected and cured at positions at which the supporting shell is to be formed on the outer surface of the supporting material, and the outer surface of the supporting material is covered with the model material having a small thickness, during the formation of the respective slices. the shaping plate for placing a shaped object thereon; a shaping-material ejection device including a plurality of model-material ejection nozzles for ejecting the model material and a plurality of supporting-material ejection nozzles for ejecting the supporting material, such that these pluralities of nozzles are arranged in a single direction; a curing device for curing the model material and the supporting material; a head portion including the shaping-material ejection device and the curing device; a horizontal driving device for reciprocatingly scanning the head portion in a horizontal direction; a vertical driving device for moving positions of the head portion and the shaping plate with respect to each other in the height direction; and a control device for controlling driving of the horizontal driving device and the vertical driving device and for controlling the ejection by the shaping-material ejection device and the curing by the curing device, wherein the control device being configured to control for causing the horizontal driving device to reciprocatingly scan the head portion in a single direction, further causing the shaping-material ejection device to eject the model material and the supporting material onto the shaping plate and causing the curing device to cure the model material and/or the supporting material at least in one of forward and rearward paths during the reciprocating scanning to form the slices, further for moving the positions of the shaping plate and the head portion with respect to each other in the height direction, and for repeating lamination of the slices to perform shaping, the supporting material is provided, on an outer surface thereof, with a supporting shell made of a material different from that of the supporting material, and the supporting shell is made of a material having higher rigidity than that of the supporting material, wherein the supporting shell is partially provided with an exposing portion at which the supporting material is exposed, and wherein the control device is adapted to control the shaping-material ejection device such that the model material is ejected and cured at positions at which the supporting shell is to be formed on the outer surface of the supporting material, and the outer surface of the supporting material is covered with the model material having a small thickness, during the formation of the respective slices.