Transfer device for living organisms

A transfer device for a living organism for placing an object into the living organism, comprising:

• a plurality of movable units,
• each movable unit of the plurality of movable units comprising at least two identical needles extending in a first direction, each needle having a cylindrical shape storing the object therein,
• each movable unit of the plurality of movable units being configured to move in the first direction,
• a control part that independently controls movement of each of the plurality of movable units in the first direction, and
• a suction pressure part applying suction to an inside space of each of the two or more identical needle to incorporate the object into the respective needle and pressurizing the inside space of the respective needle to release the object from the respective needle,
• wherein the control part is configured to consequently move each of the plurality of movable units towards the living organism so that each of the needles of each of the plurality of movable units penetrate the living organism for the same penetration depth, the control part is further configured to release the object into the living organism after the needles of each of the plurality of movable units penetrate the living organism for the same penetration depth,
• the control part is configured to initiate first movement of a first unit of the plurality of movable units and then for each subsequent unit of the plurality of movable units, the control part is configured to initiate movement of a respective unit at a time when the movement of a preceding adjacent unit stops after penetrating to said penetrating depth;
• the control part is configured to consequently withdraw each of the plurality of movable units from the living organism;
• the control part is configured to initiate first movement of a unit of the plurality of movable units to withdraw the unit from the living organism and then for each subsequent unit of the plurality of movable units, the control part is configured to initiate withdrawal movement of the respective unit to withdraw the respective unit from the living organism at a time when a preceding adjacent unit of the plurality of movable units completes withdrawal movement from the living organism,
• wherein the object consists of a liquid and a cell aggregate, and
• each of the at least two identical needles comprises (a) a first tube including a tip part of the needle, (b) a second tube including a base end of the needle, the second tube having a larger flow passage cross-sectional area than that of the first tube, and (c) a stopper at a junction between the first tube and the second tube, an internal space of the first tube and the internal space of the second tube communicate with each other and form a single flow passage of the needle, the stopper crosses the flow passage of the needle in a middle of the flow passage, the stopper allows passing of the liquid material of the object from the tip part of the respective needle to the base end of the respective needle with respect to the stopper, while preventing passing of the cell aggregate of the object from the tip part of the respective needle to the base end of the respective needle with respect to the stopper.