Abstract: In this study the use of domestic and commercial woods of the Caspian Sea forest fringes and evaluation of their durability against marine destructive factors were investigated. The samples of elm (Zelkova carpinifolia), oak (Quercus castanifolia), beech (Fagus orientalis), Maple (Acer insgin), Alder (Alnus subcordata) and horn beech (Carpinus betulus) species were impregnated with CCA (Chrome-Cupper-Arsenic). Treated and untreated (natural as a control) woods have been established for 3, 6, 9 and 12 months in Amir-abad beach of Behsharhre under fishing environment. The results of observations showed that in this beach, the staining fungi and balanus were able to attack control woods or live on them. With increasing woods maintaining in the sea, their presence became longer. The numerical results of samples weight loss showed that durability of control wood samples after one year made less than 5% in weight losses of elm, maple, alder and horn beech. However, control samples of oak and beech had no weight losses. The treated samples not only had no weight reduction, the absorbed salts made their weight increase. Low salinity level of Caspian Sea with respect to salinity of large sea (oceans), made absence of wood drilling worms in Caspian Sea and this may be the main reason of non-destructive wood samples.