To provide a support device having preferable operability.A music stand includes a support body supporting a music. A movable body is provided at a support column of the support body to be movable. A fixed body is provided at a lower end portion of the support column. A leg body is fitted to the movable body to be rotatable. The fixed body and the leg body are connected with a connection body. The movable body has three leg fitting projections arranged in a peripheral direction of the movable body main body part. The leg body has facing portions separately facing each other with the leg fitting projection interposed.