Disclosed is an up-down worktable including a base frame, a lifting member installed on the base frame to be vertically slidable, a work support having one side surface provided with a mounting surface to allow an object to be transferred to be mounted thereon and having an end pivotably installed on the lifting member, a lift support portion installed on the base frame to move the lifting member upward while elastically supporting the lifting member to allow the lifting member to move downward according to a load of the object mounted on the mounting surface, and an angle restriction portion configured to restrict a pivoting angle of the work support so that the mounting surface is set in a direction of intersecting with a sliding direction of the lifting member to mount the object on the mounting surface or the work support stands straight with respect to the base frame.