In a keyboard device, a frame function part is provided integrally in a frame to engage with a component of the keyboard device excluding the frame. Integrated continuous parts are formed at the frame and extend continuously over a key zone including a plurality of keys. The integrated continuous part receives external force directly or via the frame function part or allows a component constructed separately from the frame to mount on the integrated continuous part. A connection rib is formed in the frame such that the connection rib extends in a direction intersecting a direction along which the keys are arranged side-by-side. The integrated continuous parts are formed at positions deviated with respect to each other, when viewed from a side of the frame. The integrated continuous parts are connected to each other only by the connection rib.