PROBLEM TO BE SOLVED: To provide a processing device for improving hair regeneration efficiency when mesenchymal cells are aggregated to form a hair follicle primordium. SOLUTION: The processing apparatus 100 has a drive control unit 101, an aggregation control unit 102, a discharge control unit 103, a position detection unit 104, a first discharge unit 106, a second discharge unit 107, as its functional configuration. It is provided with an aggregating unit 108, a driving unit 109, and a detection device 110, and ejects droplets containing cells and a substance that assists aggregation into one hole opened in a living body to aggregate the droplets. [Selection diagram] Fig. 1【課題】間葉系細胞を凝集させて毛包原基を形成する際に、毛髪の再生効率を向上させる加工装置を提供する。【解決手段】加工装置１００は、その機能的な構成として、駆動制御部１０１、凝集制御部１０２、吐出制御部１０３、位置検出部１０４、第１の吐出部１０６、第２の吐出部１０７、凝集部１０８、駆動部１０９及び検出装置１１０を備え、細胞及び凝集を補助する物質を含む液滴を生体に開いた１つの孔に対して吐出し、液滴を凝集させる。【選択図】図１
