PURPOSE: To efficiently form a wall body without break-away and fall-off by laying wall forming members on a formwork, uniformly sticking them on the surface of a wall body main body through fitting tools, binding members, and binding agent, and manufacturing it in a factory.

CONSTITUTION: Wall forming members 3 are laid on a formwork 1 provided with a plurality of through holes while forming joint 4. Fitting tools 5 are inserted and projected from the underside of the formwork 1 to the joint 4, contacted with the wall forming members extending over two, and lockingly fixed to the formwork 1. Next, binding members 6 formed out of annular parts 6a, locking bodies 6b, and grounding branch bodies 6c are plantedly provided on the upper faces of the wall forming members 3. Further, filler 7 such as ballast is filled in the joint 4, binding agent 8 such as mortar is coated in layer so as to bury the keep plates 5b of the fitting tools 5, and the wall forming body 3 is formed in one body on the inner face of the formwork 1. Hereby, a wall body preventing break-away and fall-off can be manufactured.