PURPOSE: To increase workability by providing multiple vertical through holes on the periphery of a pre-building frame and depositing concrete under the pre-building frame through the holes to form a following building frame, in constructing an underground structural body using a reverse depositing method.

CONSTITUTION: Multiple through holes 3 are formed in inter-beam direction where a continuous underground wall 7 is provided. Next, a pre-building frame 1 is formed adjacent to the hole 3 side of the wall 7. The lower part of the pre-building frame 1 is dug and a form 9 is assembled. Then a hose 6 is inserted into the hole 3, concrete 4 is deposited to place-joint a following building frame under the pre-building frame 1 and fill concrete also into the hole 3. Thus the placing joint parts are densely filled up to increase reliability, the work can be made easily and speedily, and the work period and work cost can be also be reduced.