Abstract: This consists of six pieces: a bottom (1), two side pieces (2), (2?) and two ends (3), (3?), and a lid or top (4), all made of medium or high density wood fiber and that can be assembled by means of a number of tabs (11) and (29) emerging from some of said pieces and which couple by a tongue and groove system to respective slots (19) and (17) made in other pieces. The box has stacking means which are materialized in upward extensions (20), (20?), (24), (24?) of the upper ends of the side pieces and of the ends, determining oblique edges, coinciding with notches of the same shape made in their lower edges, which allow these to be self-centring. The free outwardly-projecting ends of the securing tabs constitute a spacer between boxes, which when these are palletised means that conduits are formed to facilitate air circulation between them.