Abstract: In a striking mechanism (1) for a piano, grand piano, or similar string instrument the power for the key (8a) is transferred to the hammer (3) via a rod system (10, 11, and 12) so adapted that the connection of the key (8a) and the hammer (3) is never interrupted. The rod system (10, 11, and 12) is supported during the striking movement against deflection by a first guide boss or roller (18) supported by a first curve guide (19), and during the return movement by a second guide boss or roller (20) supported by a second curve guide (21). The first curve guide (19) can swing between a first, advanced position in which it is releasably locked by a locking pawl (28) and the rod system is capable of causing the hammer (3) to touch the string when the key (8a) is pressed down, and a released second retracted position in which this is no longer possible. This ensures that the hammer (3) is withdrawn so rapidly after having struck the string (2) that the string can vibrate freely and deliver its note.