A three-dimensional fabrication apparatus comprising: a fabrication chamber in which powder is layered to form a powder layer, the powder of the powder layer is bonded together to form a layered fabrication object, and another layered fabrication object is laminated on the layered fabrication object; a supply chamber to retain the powder to be supplied to the fabrication chamber; a flattening unit to flatten the powder while transferring and supplying the powder from the supply chamber to the fabrication chamber; and a powder collector disposed forward from the flattening unit in a transfer direction of the flattening unit in which the flattening unit transfers the powder, the powder collector movable with movement of the flattening unit, the powder collector to collect a portion of the powder transferred and supplied with the flattening unit, the powder collector including: a body container to contain the powder inside; a collection port to introduce the powder to the body container; and a discharge port to discharge the powder contained in the body container, wherein, when the flattening unit transfers and supplies the powder, the powder collector collects the portion of the powder from the collection port and contains the portion of the powder in the body container, and wherein, when the flattening unit returns to the supply chamber, the powder collector discharges and supplies the powder from the body container to the supply chamber through the discharge port. a fabrication chamber in which powder is layered to form a powder layer, the powder of the powder layer is bonded together to form a layered fabrication object, and another layered fabrication object is laminated on the layered fabrication object; a supply chamber to retain the powder to be supplied to the fabrication chamber; a flattening unit to flatten the powder while transferring and supplying the powder from the supply chamber to the fabrication chamber; and a powder collector disposed forward from the flattening unit in a transfer direction of the flattening unit in which the flattening unit transfers the powder, the powder collector movable with movement of the flattening unit, the powder collector to collect a portion of the powder transferred and supplied with the flattening unit, the powder collector including: a body container to contain the powder inside; a collection port to introduce the powder to the body container; and a discharge port to discharge the powder contained in the body container, wherein, when the flattening unit transfers and supplies the powder, the powder collector collects the portion of the powder from the collection port and contains the portion of the powder in the body container, and wherein, when the flattening unit returns to the supply chamber, the powder collector discharges and supplies the powder from the body container to the supply chamber through the discharge port. a body container to contain the powder inside; a collection port to introduce the powder to the body container; and a discharge port to discharge the powder contained in the body container, wherein, when the flattening unit transfers and supplies the powder, the powder collector collects the portion of the powder from the collection port and contains the portion of the powder in the body container, and wherein, when the flattening unit returns to the supply chamber, the powder collector discharges and supplies the powder from the body container to the supply chamber through the discharge port.