PURPOSE: To inexpensively and surely apply electric treatment to a cell by putting a liquid containing the first and second cell between opposed electrodes, catching and arranging these cells in a specific state and applying direct current voltage between both electrodes.

CONSTITUTION: A liquid containing the first and second cell to be treated between fixed electrode 3 and movable electrode 13 in a chamber body 2 and the first catching part in which movable electrode is provided is moved and the first cell is caught in the hollow part 12a. The first cell is further moved to fixing electrode side together with the second cell and each cell is arranged between both the electrodes. The second cell is caught in the first cell in the follow part of the first catching part and notch 5a of the second catching part and the former approaches to the latter to press the first cell to the second cell. Then direct current voltage is applied between opposed electrodes to subject the cell to electric treatment such as electric fusion.