Objective: Cisplatin, a popular anti-neoplastic agent is employed as a first line treatment for variety of cancers. Majority of the analytical methods reported for Cisplatin are either complex or not suitable for routine analysis of the drug. Hence, there is a need for development of suitable analytical technique like ICP-AES for quantitation of Cisplatin in complex matrices and biological samples. Methods: Cisplatin was analyzed in the present study based on its single step conversion to platinum metal with aqua regia. Results: The developed method was validated and was found to be linear in the range of 0.375 to 15 μg/ml with a regression coefficient of 0.992. The percent recoveries of Cisplatin from plasma and tissue samples ranged from 95 to 99%. Discussion: A simple, low cost, sensitive, one step ICP-AES technique was developed and validated for bioanalytical estimation of Cisplatin. Key words: Cancer, Cisplatin, ICP-AES, Platinum.