The Atriplex canescens is well adapted to extreme environmental conditions and present properties accumulator of heavy metals. Our study is to investigate the effect accumulator of heavy metals (copper, zinc, cadmium and lead) by the Atriplex canescenss stressed after 60 days of the sowing. It applying five different doses to the plant Atriplex canescens for two weeks for: Zn, Cd, Pb (0, 2500, 5000, 7500, and 10000 ppm) and for copper (0, 2000, 2500, 3000 and 3500 ppm). The contents of proline and the soluble sugars were analyzed by spectrophotometry. The results obtained show an increase in the content of proline and soluble sugars according to the increasing concentration of heavy metals to the levels of the leaves and the roots. The contents of proline and the soluble sugars in leaves are widely superior to those of the roots. The highest contents inproline and soluble sugars in the leaves (74.45 mg. g-1 dry weight of the proline and 23.82 mg. g-1 dry weight of soluble sugars) are obtained in the dose of 10000 ppm of (zinc, cadmium) respectively. On the other hand, the highest contents proline and soluble sugars in roots are obtained in the metallic dose of 10000 ppm for the cadmium and the zinc respectively (46mg. g-1 dry weight of the proline and 10.26 mg. g-1 dry weight of soluble sugars). The obtained results are in favour of the implication of Atriplex canescens in a project of phytoremediation to clean up the contaminated soils.