Pressure buffer device and flow path forming member

A pressure buffer device, comprising:

• a cylinder that stores fluid;
• a flow path forming portion that forms a flow path through which the fluid flows in accordance with relative movement of a rod with respect to the cylinder in an axial direction of the cylinder;
• and
• an opening-closing portion that opens and closes the flow path of the flow path forming portion,
• wherein the flow path forming portion includes:
• a first protruded portion that is formed annularly to be protruded in the axial direction, to which the opening-closing portion is contacted;
• and
• a second protruded portion that is protruded in the axial direction toward a side opposite to the first protruded portion, that has an end in the axial direction located at a radially outer side of the first protruded portion, and that includes a tilt portion tilted with respect to the axial direction and formed at least at a part of a radially-inner part of the second protruded portion.