MICROPUMP UNIT

PROBLEM TO BE SOLVED: To provide a small and inexpensive micropump unit capable of growing cells by circulating a trace amount of the cells and culture solution, and making troublesome work unnecessary for each cell culture.SOLUTION: A micropump unit 1 comprises a sheet-like member 2 in which a magnetic material is arranged, electromagnets for a pump 51-53 and electromagnets for a valve 54-59 facing the magnetic material. The electromagnets 51-59 are excited, the sheet-like member 2 is pressure-closed, a trace amount of cells and culture solution are delivered, and a circular path 23 of the sheet-like member 2 is replenished with the culture solution of a tank 27. Thus the cells and the culture solution can be circulated inside the circular path 23 to grow the cells. The micropump unit can be made small and inexpensive by grouping the electromagnets 51-59 and the sheet-like member 2 together in advance for use. Troublesome work can be made unnecessary by providing the whole micropump unit 1 in the disposable state.