BURIED OBJECT-PROSPECTING METHOD

PROBLEM TO BE SOLVED: To provide a method for easily detecting metallic and non-metallic buried objects without increasing working man-hours. SOLUTION: In a method for prospecting a buried object in a section where piping is laid, a first process where starting and arrival shafts 1 and 2 are provided at both the ends of the laying section, and a rotation rod 4 being delivered from a ground-installation-type propulsion machine 3 is used for bore a drilling hole, and a second process where, after the first process, a detector 10 for detecting a pipeline M being already laid near the drilling hole is inserted into the boring hole for moving. In the second process, an electromagnetic wave reaching the outside of a piping aperture to be laid is transmitted to an entire region in the peripheral direction of the drilling hole from the detector 10, thus prospecting the presence or absence of the buried pipeline according to a reflection state.