A three-dimensional forming apparatus comprising: a stage; a material supply unit configured to supply the stage with a sintering material; a plurality of head units that each includes an energy radiation unit for supplying energy capable of sintering the sintering material supplied by the material supply unit; a head base that holds the plurality of head units; and a driving unit that is capable of three-dimensionally moving the head base relative to the stage, wherein the head base holds a first pair of head units (161,162), a second pair of head units (163,164) and a third pair of head units (165,166), and each of the first to third pairs of head units forms a respective line of head units arranged along a first direction and fastened to the head base, characterized in that the sintering material includes metal powder and a binder, the first to third pairs of head units together form two parallel lines, with three single head units in each of the parallel lines, and each of the plurality of head units is configured to produce a corresponding sintered portion, such that the sintered portion corresponding to each of the head units in each of the first to third pairs of head units is adjacent to the sintered portion corresponding to one of the head units in an adjacent one of the first to third pairs of head units in a case that the driving unit moves the head base along a single second direction perpendicular to the first direction, whereby a part of a configuration of a three-dimensional fabricated object is formed as an aggregate of the sintered portions formed by the energy radiated from the energy radiation units included in the plurality of head units as the head base is moved along the single second direction. a stage; a material supply unit configured to supply the stage with a sintering material; a plurality of head units that each includes an energy radiation unit for supplying energy capable of sintering the sintering material supplied by the material supply unit; a head base that holds the plurality of head units; and a driving unit that is capable of three-dimensionally moving the head base relative to the stage, wherein the head base holds a first pair of head units (161,162), a second pair of head units (163,164) and a third pair of head units (165,166), and each of the first to third pairs of head units forms a respective line of head units arranged along a first direction and fastened to the head base, characterized in that the sintering material includes metal powder and a binder, the first to third pairs of head units together form two parallel lines, with three single head units in each of the parallel lines, and each of the plurality of head units is configured to produce a corresponding sintered portion, such that the sintered portion corresponding to each of the head units in each of the first to third pairs of head units is adjacent to the sintered portion corresponding to one of the head units in an adjacent one of the first to third pairs of head units in a case that the driving unit moves the head base along a single second direction perpendicular to the first direction, whereby a part of a configuration of a three-dimensional fabricated object is formed as an aggregate of the sintered portions formed by the energy radiated from the energy radiation units included in the plurality of head units as the head base is moved along the single second direction. wherein the head base holds a first pair of head units (161,162), a second pair of head units (163,164) and a third pair of head units (165,166), and each of the first to third pairs of head units forms a respective line of head units arranged along a first direction and fastened to the head base, characterized in that the sintering material includes metal powder and a binder, the first to third pairs of head units together form two parallel lines, with three single head units in each of the parallel lines, and each of the plurality of head units is configured to produce a corresponding sintered portion, such that the sintered portion corresponding to each of the head units in each of the first to third pairs of head units is adjacent to the sintered portion corresponding to one of the head units in an adjacent one of the first to third pairs of head units in a case that the driving unit moves the head base along a single second direction perpendicular to the first direction, whereby a part of a configuration of a three-dimensional fabricated object is formed as an aggregate of the sintered portions formed by the energy radiated from the energy radiation units included in the plurality of head units as the head base is moved along the single second direction.