PROBLEM TO BE SOLVED: To provide a whiteboard whose height can be adjusted. SOLUTION: A holder including two parallel columns 11 and frames are fixed on four sides, a board main body provided between the two columns, and fixed on both sides of the frame of the board main body 2. A whiteboard comprising one bolt and a connecting frame, both ends of which are fixed to two stanchions and located below the board body, with a locking device fitted to the frame in the middle. Is provided with at least two slots 12a, 12b with different altitudes on one side facing the board body, the bolts are rotatably inserted into the slots so as to pivotally attach the board body and the holder, and each of the columns is A fixing hole 14 having an interval of H is provided below the slot, and the fixing hole fixes the connecting frame so as to fix the distance between the connecting frame and the bottom end of the board body, and the locking device faces downward. There is an elastic margin of. [Selection diagram] Fig. 4
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