Keyboard device for keyboard instrument

A keyboard device for a keyboard instrument, comprising:

• a plurality of keys each extending in a front-rear direction and having a pivot shaft extending from a rear end of said key in a left-right direction;
• and
• a keyboard chassis having a plurality of key support parts for supporting said keys, respectively, such that each of said keys can pivotally move about an associated one of said pivot shafts, and configured to hold said keys in a state arranged in the left-right direction,
• wherein each of said key support parts includes:
• a lower support portion for supporting said pivot shaft of an associated one of said keys from below, and
• a pair of left and right upper support portions erected with a predetermined spacing therebetween in the left-right direction, and configured to support a portion of said rear end of said key located upward of said pivot shaft from above, and
• wherein when mounting said key to said key support part, spacing between said pair of upper support portions is expanded by said rear end of said key, whereby said pair of upper support portions are elastically deformed to thereby allow said rear end of said key to pass therebetween, and after said rear end of said key has passed, said pair of upper support portions elastically return to an original state thereof and cooperate with said lower support portion to hold said rear end of said key in a retained state.