The necessity of natural resources protection impose to every country the use of renewable resources based alternatives as annual plants, agricultural and agro-industrial residues for human needs. The aim of this study is to obtain with locl biomaterials, efficient flat composites which can be used as substitute of sawlog in furnishing and building works. Two categories of plant material were used: the fibrious material constitutes of core of Hibiscus cannabinus and the binding material from tannin based (Parkia biglobosa and Pithecelobium dulce) and from mucilage based (Bombax costatum and Grewia venusta). The parameters taken into account in the particleboard formulations were the physicochemical treatment of plant materials and the nature of the binders. The interest of this work is in the exploration of new sources of plants likely to be used as binders in the composites sector. Mechanical properties of the panels obtained were measured according to European standards. The interesting results obtained varied with the two types of variables and were in conformity with the American standards.