The invention is a music box device comprising: a vibration plate(20) having vibration pins(22); striking wheels(30) slippably friction-coupled to a first shaft(31) and having striking protrusions(32)for striking the vibration pins(22) formed on a circumferential part with concave portions(33) interposed therebetween; a driving wheel(40) fixedly coupled to a second shaft(41) and having driving protrusions(42); a driving motor(4); a stopper array part(50) having stoppers(52) disposed adjacent to the striking wheels(30) and a plurality of solenoids(54) for reciprocatingly driving each of the stoppers(52); and a microcomputer(10); wherein the solenoids(54) of the stopper array part(50)are flatly wound so as to have a long hole(56) therein, and comprise coils(55) arranged so that the flat side surfaces are adjacent to each other and a movable core(57) which has a flat plate shape that is inserted into the long hole(56) in each of the coils(55) and has an upper end in which the stoppers(52) are attached thereto.