Rotation operation device and electronic keyboard instrument

The present invention addresses the problem of providing a rotation operation device and an electronic keyboard instrument having excellent operability and productivity. A rotation operation device according to one embodiment of the present invention is provided with: a rotation detection unit that detects rotation; a knob having an operation part that rotates in conjunction with the rotation detection part, and a locking part that is disposed at a position on the inner diameter side of the outer edge part of the operation part; and an accommodating part which is provided with an engaging part that engages with the locking part and accommodates the rotation detection part. 本发明要解决的课题在于提供操作性以及生产率优异的旋转操作装置以及电子键盘乐器。本发明的一方式涉及的旋转操作装置具备：旋转检测部，检测旋转；旋钮，具有与所述旋转检测部连动而旋转的操作部、以及配置于所述操作部的外缘部靠内径侧的位置的卡定部；以及收容部，具备卡合于所述卡定部的卡合部，并收容所述旋转检测部。