Aim: The study was conducted to evaluate the concentrations of trace elements (Cd, Co, Cr, Cu, Mn, Pb and Zn) in the blood of chronic bronchitis (CB) patients in comparison with healthy subjects. Methods: Flame atomic absorption spectrometry was used for the quantification of trace elements by employing the nitric acid -perchloric acid based wet digestion method. Results: In the blood of CB patients and healthy donors, highest mean level was found for Zn at 1598 |ig/l and 2851 ng/1, respectively, followed by Cu and Pb. Correlation study showed a number of significantly strong relationships aniong trace elements in the blood samples of healthy donors whereas only a few strong relationships were noted for the patients. Principal component analysis (PCA) of the elemental data revealed two PCs for patients and three for healthy donors, but with significant different loadings. Cluster analysis (CA) also evidenced a considerably different pattern of elemental clustering in the blood of CB patients and healthy subjects. Conclusions: Average concentration of Cd was found to be significantly higher, and those of Zn, Co and Pb were considerably lower in the blood of CB patients. Correlation coefficients and multivariate apportionment among the elements in the blood of CB patients and healthy donors were significantly divergent. Variations in the elemental levels were also observed with respect to gender, food and smoking habits in both categories.