A shock absorber in a liquid conduit (4) is provided. The shock absorber comprises a closed liquid tank (10), which is partly filled with gas and has a joint means (11) connected to the conduit (4). Via the joint means, liquid can flow to and from the tank (10) for compressing and decompressing the gas. The joint means (11) comprises a check valve means which, in its forward direction, permits a substantially free liquid flow from the conduit (4) to the tank and, in its rearward direction, permits throttled liquid flow from the tank to the conduit.