PURPOSE: To provide a construction way of a continuous underground wall which extremely improves the impervious effect at the general portion excerpt between walls and as a result, gets rid of necessity of carrying out repair works for sealing.

CONSTITUTION: A specified dimensional ground is excavated by use of a stabilizer by an excavating machine for a continuous underground wall and a steel rod cafe 3 is lowered in the hole 6 and then concrete 5 is placed to form a reinforced concrete panel. At least the side face of ground of the steel rod cage 3 is covered with a water-impermeable sheet 12 between partition plates 9. Concrete is placed inside the impermeable sheet 12.