Vocal music teaching blackboard

The utility model provides a vocal music teaching blackboard, the utility model relates to a blackboard. In order solving current vocal music mr five finding activates that need draw up on the blackboard, and this five finding activate often vocal music mr free hand drawing become, its parallel degree and spacing distance hardly rely on the trick measure with the problem of assurance. The blackboard: the blackboard is hollow structure, and the blackboard left side is equipped with the recess, is provided with first smooth movable rail way in the recess, and the blackboard right side is equipped with the smooth movable rail way of second, first gear, the second area gear and first chain inner gearing taken, and third area gear, fourth area gear and the inner gearing of second chain, first gear and the third area gear taken is connected through first pivot, and second area gear is connected through the second pivot with fourth area gear, just is equipped with two bearings in first pivot and the second pivot res