Mangroves are diverse plant communities consisting of tropical to subtropical trees and shrubs growing in intertidal coastal zones. Mangrove, eco-physiology and growth characteristics as effected by nutrient, salinity, metals, PHA and other pollutants including phytoremediation have been previously investigated. However, the phytoremediation of polychlorinated biphenyls (PCBs)-contaminated sediments by mangrove is a largely untouched area of research. This study was conducted to determine if mangrove specie Kandelia candel could be used for phytoremediation of PCBs-contaminated sediments. In this study, Kandelia candel seedlings were grown in PCB contaminated sediment for determining the eco-physiological responses of mangrove species Kandelia candel to PCBs phytotoxicity. The influence of increasing concentrations of PCBs (0, 180, 900, 1800 and 2700 μg kg-1) on stem height, basal stem diameter, total biomass, growth rate, chlorophyll content, chlorophyll a/b ratio, water potential, free proline content and MDA contents were measured. Results were as follows: (1) After 6 months of exposure to PCBs, the growth of stem height, basal stem diameter, total biomass and the relative growth rate were equal or higher than the control which indicated that PCBs did not inhibit the growth of Kandelia candel; (2) The chlorophyll a, chlorophyll b and chlorophyll a+b content in the leaves of Kandelia candel decreased moderately and the chlorophyll a/b ratio increased moderately with increase in PCBs concentration in the sediment. However, the chlorophyll content was never less than 70% and the chlorophyll a/b ratio never more than 15% of PCBs-free control plants. The plants, even though exposed to PCBs, were still able to maintain relatively normal levels of photosynthetic pigments and a constant chlorophyll a/b ratio. (3) The water potential, free proline content and MDA in leaves of PCBs-stressed Kandelia candel seedlings were stimulated significantly in comparison to control, with an increase in PCBs concentration in the sediment. The study clearly demonstrated growth and physiological function of mangrove species Kandelia candel was not adversely impacted by PCBs contaminated sediment and thus could be used in phytoremediation of PCB contaminated sediment.