FUEL CELL, ELECTROCHEMICAL DEVICE, AND METHOD OF TIGHTENING AND ADJUSTING FUEL CELL

According to an embodiment, a fuel cell includes: a cell staked body including a plurality of single unit fuel cells stacked one on another; a collecting plate located on the cell stacked body in a stacking direction; an insulating plate located on the collecting plate and a tightening structure located on the insulating plate and configured to hold the collecting plate and the insulating plate on the cell stacked body by being tightened toward the cell stacked body The tightening structure includes a first tightening plate including a planar portion in surface contact with the insulating plate and a second tightening plate located on the first tightening plate and configured to press the first tightening plate against the insulating plate by being tightened toward the cell stacked body