To provide a method of assembling an eternal shuttering that allows to confirm easily how concrete is filled in corners in building a structure having corners such as a pole or a beam by concrete placement, and members used therefor.

A shuttering is assembled in a concrete placement site by connecting flat plate members 1 nearly covering the flat section of a structure such as a pole or beam with fixing bolts 3, using an L-shaped member 2 that covers their corners and their neighborhoods and connects the flat plate members 1 adjoining each other with the corner interposing between them, and after concrete is placed and cures, by removing the L-shape member 2, it is confirmed how concrete is filled in the corner. The L-shaped member 2 is reused in a corner of a structure of the same shape to reduce cost. If the L-shaped member is made transparent, it is possible to confirm how concrete is filled at the time of concrete placement.