Cell cryopreservation tool

1. A cell cryopreservation tool comprising:

a cell holding member having a body part formed of a liquid nitrogen-resistant material and a cell holding part formed of said liquid nitrogen-resistant material;

an accommodation tube, closed at one end thereof, which is capable of accommodating said cell holding member, and wherein said accommodation tube has a tubular body formed of said liquid nitrogen-resistant material;

said cell holding part of said cell holding member has an elongated cell attaching and holding portion;

said cell attaching and holding portion has a first metal heat conductor extending in a longitudinal direction thereof and provided at one side or both sides of said cell attaching and holding portion;

said first metal heat conductor has an exposed portion exposed from said cell holding member;

said accommodation tube has a second metal heat conductor and a distal-end closed portion to prevent cooling medium from entering;

said second metal heat conductor has an inner side exposed part exposed to an inner space of said accommodation tube; and

when said cell holding member is accommodated in said accommodation tube, said exposed portion of said first metal heat conductor of said cell holding member contacts said inner exposed part of said second metal heat conductor in said accommodation tube.

2. The cell cryopreservation tool according to claim 1 , wherein said second metal heat conductor has an outer side exposed part exposed to an outer space of said accommodation tube.

3. The cell cryopreservation tool according to claim 1 , wherein said first metal heat conductor of said cell holding member extends from a distal portion of said cell attaching and holding portion to a proximal side of said cell attaching and holding portion.

4. The cell cryopreservation tool according to claim 1 , wherein said second metal heat conductor is provided at a distal portion of said accommodation tube.

5. The cell cryopreservation tool according to claim 1 , wherein said second metal heat conductor is provided on a side surface of said accommodation tube.

6. The cell cryopreservation tool according to claim 1 , wherein said first metal heat conductor is provided at both sides of said cell attaching and holding portion in such a way that said first metal heat conductor is extended from a distal portion of said cell attaching and holding portion to a proximal side of said cell attaching and holding portion.

7. The cell cryopreservation tool according to claim 1 , wherein said cell attaching and holding portion has a cell accommodation concave portion; and

said first metal heat conductor is disposed essentially at one side or both sides of a portion of said cell attaching and holding portion where said cell accommodation concave portion is formed.

8. The cell cryopreservation tool according to claim 1 , wherein said cell holding part has a rectangular cross section.

9. The cell cryopreservation tool according to claim 1 , wherein said liquid nitrogen-resistant material is a synthetic resin, and wherein said synthetic resin is 3-polyethylene fluoride, low-density polyethylene, medium-density polyethylene, high-density polyethylene, polycarbonate, nylon, polysulfone, polyester, polystyrene, polyimide, ultra-high-molecular weight polyethylene, ethylene-vinyl acetate copolymer, or laminates of films formed of said synthetic resin.

10. The cell cryopreservation tool according to claim 1 , wherein said cell holding part is transparent or semitransparent.

11. The cell cryopreservation tool according to claim 1 , wherein said cell holding part has a width of 0.4 mm to 1.0 mm and a length of 5 mm to 30 mm, and wherein said body part has a length of 20 mm to 100 mm.

12. The cell cryopreservation tool according to claim 1 , wherein said tubular body is transparent or semitransparent.