Metal bellows

A metal bellows for an accumulator into which a hydraulic fluid or a pressure gas is drawn in, the metal bellows having a bellows-shape in which ridge fold portions and valley fold portions are formed repeatedly with slope portions in between, wherein

• two of the slope portions that are adjacent to each other via a common ridge fold portion have:
• first slope portions each of which extends from the common ridge fold portion such that a distance therebetween becomes greater as the first slope portions extend toward adjacent valley fold portions or such that the distance therebetween remains constant;
• and
• second slope portions each of which extends from each of the first slope portions extending from the common ridge fold portion such that a distance therebetween becomes much greater than the first slope portions as the second slope portions extend toward the adjacent valley fold portions, wherein
• the first slope portion and the second slope portion are such that cross sections thereof are connected at an inflection point.