To provide a spiral pile capable of obtaining mighty strength while constituting a spiral vane of a relatively thin steel plate and increasing bearing capacity of the spiral pile.

A pile body 1 constituted of a steel pipe, and the spiral vane 2 is formed into a plurality of turns on the outer circumferential surface of the front end of the steel pipe by welding. The spiral vane 2 is made of a steel, a pitch is fixed or it becomes gradually small as it goes up from down, and the spiral vane on the upper end makes approximately the horizon or a reverse pitch. The spiral vane 2 is surrounded by a cylinder 3 to combine the spiral vane and the the cylinder 3. Earth and sand excavated by the rotation of a pile is mounted on the upper surface of the spiral vane 2 to rise, and when the earth and sand reach the horizontal spiral vane, the movement is controlled by the horizontal spiral vane. Since the spiral vane 2 is surrounded by the cylinder 3, the earth and sand can not escape sideways, and the earth and sand are consolidated between both turns of the spiral van 2 to form a lump of firm earth and sand to hold the spiral vane 2 between the upper and the lower sides. Since a diameter reamed section consisting of the spiral vane 2 and the consolidated earth and sand is formed in the front end of the pile, bearing capacity of the pile is increased.