To provide a cast-in-place pile provided with an in-ground heat exchange pipe for effectively utilizing underground heat, free from cross-sectional defect of the pile, and capable of effectively preventing defect of the in-ground heat exchange pipe in inserting a reinforcement cage into a posthole, and further effectively preventing freeze-thaw of concrete constituting the pile even when cooling phenomenon occurs in absorbing heat.

In this cast-in-place pile formed by disposing the reinforcement cage 2 in the posthole formed by excavating the ground, and then placing concrete into the posthole, an outer periphery of the reinforcement cage 2 provided with a plurality of spacers 3 for ensuring a concrete placement thickness of reinforcing bars on optional places of its outer face, is further coated with a resin foam plate 4 in the circumferential or spiral direction in a state of being directly or indirectly kept into contact with outer faces of the spacers 3, and the in-ground heat exchange pipe 5 is cylindrically spirally fixed to an outer face of the resin foam plate 4.