Provided is a novel music box device that can play music for a long time and can also suppress a thickness.The present invention relates to a music box device including: a sheet that has a playing engagement part and is rotated by a driving means; a star wheel arranged oppositely to the sheet and having two or more claws on an outer peripheral surface; and a vibration valve arranged adjacent to the star wheel. In the music box device, as the sheet is rotated by the driving means, the playing engagement part is linked with one claw to rotate the star wheel while another claw plucks the vibration valve to play music, and the sheet has a helical plate shape.