The invention relates to a fluid damper for bodies that are movable relative to one another, said damper comprising a piston that is movably guided in a cylinder. At least one through opening is provided in the piston and/or between the piston and the cylinder for through-flowing fluid. Adjustment means are provided on the fluid damper for adjusting a limitation least of the maximum possible through-flow cross section for the fluid at least one passage opening. The piston is connected to a piston rod leading out of the cylinder. The adjustment means comprises detent connection which is pushed, in a radially non-twistable manner, onto the end of the piston rod located in the cylinder, and holds the piston in a desired position in the cylinder.