Percussive tool with fluid-pressure drive and a protection device

The invention relates to a protective device to a fluid-operated percussion with a housing part (6), of at least the end face against the percussion mechanism External environment and shields in which a driven by percussion Percussive tool (4) protrudes; the housing part (6) has, on its passage opening for the percussion mechanism (4) an outer seal (11) on which the impact tool (4) transversely to its longitudinal axis (4a) enclosing at most a small spacing and is designed to be movable in the transverse direction. To improve the reliability of the percussion mechanism is proposed that form outer seal (11) as a transversely movable transverse slide, as the unit is moved in transverse movements of the striking tool of this. The outer seal (11) is opposite to the striking direction of the striking tool (4) an inner seal (12) downstream of that of the striker (4) outside of the tool guide (3) elastically rests with both seals (11, 12) are interchangeably secured.