Blackboard

The invention provides a blackboard, aiming to solve the problems of chalk dust flying and blackboard cleaning difficulty. The blackboard is in a double-layer composite structure; the top of the blackboard is provided with a blackboard eraser, and the bottom is provided with a chalk dust collection box; and the blackboard eraser is fixed on the upper end of the blackboard. Because the top of the blackboard is provided with the scroll blackboard eraser, the writing on the whole blackboard can be erased by using the scroll blackboard eraser through pulling a handle arranged on the lower part of the blackboard eraser. In addition, because the bottom of the blackboard is provided with the chalk dust collection box, the chalk dust pollution can be prevented.