In birds, heavy metal concentrations are influenced by diet intake, migratory pattern, and residence time. In the present study, heavy metal concentrations (Cr, Cu, Cd, Zn, Ni and Pb) were measured in muscle, liver, brain, lung, kidney and hearth of Brown Pelican (Pelecanus occidentalis) from Araya Peninsula, Sucre State, determined by atomic spectrophotometry matched inductively. Ni and Pb concentrations did not differ among tissues; in contrast, Cr and Zn showed significant differences between tissues, being greater in pectoral muscle. Cu and Cd showed significant differences between tissues, being significantly higher in liver and kidney. The results might be associated to several interpretations. For instance, in birds, pectoral and supracoracoides muscles are responsible of flight, which implicates an intense metabolic activity and enormous blood irrigation, additionally, pelicans stay a lot of time in marine waters, this would allow them to exchange dissolved metallic ions and incorporate to its tissues by absorption. On the other hand, the high metabolic activity of liver and kidney allow to link metals to metallothioneins, avoiding harmful concentrations in the organism. Differences in metal concentrations between Brown Pelican tissues are likely due to differences in diet, metallothioneins, timing of sampling and molting. Anyhow, these values are comparable to those reported for other species sampled and other places and are below levels known to cause adverse effects in seabirds.