A support device which supports an attaching object and by which the supported attaching object can be set in a horizontal state, comprising: a base body to be attached to a tripod; a pan turning body provided on the base body turnably in the horizontal direction; a tilt turning body which is provided on the pan turning body turnably in the up-down direction and to which an attaching object is attached a level provided on the tilt turning body; a pan fixing operation body for fixing the pan turning body with respect to the base body in a releasable manner; a tilt fixing operation body for fixing the tilt turning body with respect to the pan turning body in a releasable manner; and a tilt turning operation body for turning the tilt turning body in the up-down direction with respect to the pan turning body, wherein the tilt turning operation body is provided rotatably, according to rotation in one direction of the tilt turning operation body, the tilt turning body turns upward with respect to the pan turning body, according to rotation in the other direction of the tilt turning operation body, the tilt turning body turns downward with respect to the pan turning body, the pan turning body has plate-shaped portions supporting a turnable shaft-shaped portion in which a lower screw hole portion is formed, the tilt turning body has plate-shaped portions supporting a turnable shaft-shaped portion in which an upper screw hole portion is formed, and the tilt turning operation body includes an operation main body portion, a lower screw shaft portion that projects downward from the operation main body portion and is screwed in the lower screw hole portion of the shaft-shaped portion, and an upper screw shaft portion that projects upward from the operation main body portion and is screwed in the upper screw hole portion of the shaft-shaped portion. a base body to be attached to a tripod; a pan turning body provided on the base body turnably in the horizontal direction; a tilt turning body which is provided on the pan turning body turnably in the up-down direction and to which an attaching object is attached a level provided on the tilt turning body; a pan fixing operation body for fixing the pan turning body with respect to the base body in a releasable manner; a tilt fixing operation body for fixing the tilt turning body with respect to the pan turning body in a releasable manner; and a tilt turning operation body for turning the tilt turning body in the up-down direction with respect to the pan turning body, wherein the tilt turning operation body is provided rotatably, according to rotation in one direction of the tilt turning operation body, the tilt turning body turns upward with respect to the pan turning body, according to rotation in the other direction of the tilt turning operation body, the tilt turning body turns downward with respect to the pan turning body, the pan turning body has plate-shaped portions supporting a turnable shaft-shaped portion in which a lower screw hole portion is formed, the tilt turning body has plate-shaped portions supporting a turnable shaft-shaped portion in which an upper screw hole portion is formed, and the tilt turning operation body includes an operation main body portion, a lower screw shaft portion that projects downward from the operation main body portion and is screwed in the lower screw hole portion of the shaft-shaped portion, and an upper screw shaft portion that projects upward from the operation main body portion and is screwed in the upper screw hole portion of the shaft-shaped portion.