Metal bellows

A metal bellows in an annular shape configured to be accommodated in a shell, having a fixed end and an freely moving end in an axial direction, and comprising, axially repeatedly, a structure in which, from an axial end portion at each of the fixed end and the freely moving end, a belly, a valley, a belly, a peak, and a belly are integrally formed in series sequentially in this order, wherein

• the end portion has a first connection belly connected to a fitting member, and a connection valley and a second connection belly extending sequentially from the first connection belly axially inward, and
• the connection valley in a free state has an axial width set larger than an axial width of valleys or peaks in a portion other than the end portion,
• wherein the metal bellows further comprises a vibration damping ring for guiding the metal bellows to axially move along an inner surface of the shell during extension and contraction operations, provided at the freely moving end in a manner fitting astride the fitting member and the freely moving end, wherein the vibration damping ring includes a mounting portion inserted in the end portion at the freely moving end in a manner abutting against and contacting a surface of the connection valley of the end portion.