The invention relates to a piano hammer for striking the strings of a piano, including a hammer shank and a hammer head, which is covered with a cover along at least part of its peripheral surface. The aim of the invention is to provide an improved piano hammer which can be tuned in a simple and reproducible, especially also reversible, manner. According to the invention, the cover has a varying thickness along the peripheral surface and the hammer head can be adjusted with respect to the position of its peripheral surface with which it impacts the one or more string(s) to be struck.