To provide a keyboard support device which is adaptively fitted to an overhead cabinet, a strap, the bottom surface of a low ceiling, etc.

This is the keyboard support device, including a storage compartment, which is adaptively fitted to the overhead cabinet 10, the bottom surface of the low ceiling, etc. The keyboard support device further includes at least one expandable support arm 45A or 45B which is connected to the storage component 5 pivotally at one end and a keyboard platform 60 which is connected to the other end of the support arm pivotally on the opposite flank. Each support arm is adaptively extended downward from the storage component 5 so that the keyboard platform 60 is arranged below the storage compartment 5 as operation constitution. Each support arm is furthermore adaptively drawn in so that the keyboard platform 60 is arranged in the storage component 5 for storage constitution.