A keyboard instrument is provided which inhibits generation of unintended, audible noise. A partition (body part) is arranged between adjacent hammers corresponding to keys. In the keyboard instrument provided with the partition, even if the keyboard instrument is rotated vertically and a hammer falls, the partition prevents the hammer from freely falling and striking adjacent hammers. Also, the hammer is restricted from generating unintended sounds for reasons unrelated to falling. Accordingly, generation of an unintended audible sound of the hammers can be reliably restrained in the present keyboard instrument.