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With enormously increasing global population and rapidly depleting natural resources, there is an apparent demand for radical unprecedented innovation to satisfy the basic necessities of all living organisms. Hence, non-conventional and renewable biodiesel is gaining interest because of being a potential alternative, reliable source and ecofriendly future fuel. However, quality of biodiesel needs to be checked strictly in order to maintain the efficiency of fuel as several impurities like catalyst residues, free fatty acid contents, soap formation, monoglycerides, diglycerides and a significant amount of glycerol pose serious problems while using biodiesel in the engine. Conventional purification techniques including wet washing and deionized water washing are now being replaced by advanced purification methods such as adsorbents or membranes due to the generation of a huge amount of wastewater, large quantities of environment polluting agents and more consumption of energy. In this review, different purification methods and different adsorbent materials are discussed in detail among which magnesol and silica have shown better results than purolite and amberlite. Furthermore, some bio-adsorbents (sugarcane bagasse, OEPFB, eucalyptus pulp, cellulose, starch, and rice husk ash) along with pressurized CO2 passage for purification of biodiesel are also being used nowadays. Commercially available cation and anion exchange resins are known to provide biodiesel purity level according to ASTM and ANP standards. Inorganic ceramic based membranes are better than organic membranes as they not only provide appreciable results but …