A crash buffer (1) for supporting structures (3) of rail vehicles with controlled compression is proposed, with a first and a second guide part in the form of a sleeve (2) and a plunger (6), the sleeve having a fastening flange (2a) which the sleeve can be fixed in place on the support structure, and the plunger is displaceable relative to the sleeve in the vehicle longitudinal direction and is guided by the sleeve during its displacement movement, and with a force transmission element (8) for resilient coupling of the plunger to the support structure. A third guide part in the form of a guide rod (7, 7a), which has a smaller cross-section than the first and second guide part (2), is attached / mounted on the tappet, the fastening flange having a through-opening (4) in which the guide rod is mounted is.
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