Abstract: A new type of portable, collapsible wood burning stove that can be easily disassembled and assembled for use with very small pieces of wood or coal and when so used is environmently efficient comprising relatively small front and back metal plates having along both sides a cut out slot extending from the bottom edge, two other plates having along both sides a cut out slot extending from the top edge, the front and back plates being removably joined to the side plates to form a box structure by having the cut out slots of the front and back plates inserted down into the slots of the other plates, the height of the front and back plates being adjust so that their top edges are above the edges of the other plates and air space remains below the bottom edge of the of such plates, a metal grate and ash pan being inserted inside the box structure and held in place by protruding elements from the side plates, and method for using the same.