Panel having interlocking folds used as interior or exterior finishing material for buildings

A panel having interlocking folds which is used as an interior or exterior finishing material for buildings, comprising:

• a panel body having a tetragonal sheet shape;
• outer interlocking folds provided on a surface of the panel body by folding outwardly two neighboring sides of the panel body so that the outer interlocking folds extend in parallel to the surface of the panel body;
• inner interlocking folds provided on an opposite surface of the panel body by folding inwardly two remaining sides of the panel body opposite to the outer interlocking folds so that the inner interlocking folds extend in parallel to the opposite surface of the panel body;
• and
• a locking part to be fastened to a support surface by a locking nail, the locking part being provided at a corner of the panel body between the outer interlocking folds or the inner interlocking folds while diagonally extending on a same plane as that of the panel body.