Abstract: In the present work, raw rice husk was modified using aqueous blend of alkali (NaOH) and ionic liquid (1-Ethyl-3-methylimidazolium acetate). The chemically treated rice husk (CTRH) and raw rice husk (RRH) reinforced polylactic acid (PLA) biocomposites were prepared using the Haake rheomixer, followed by compression moulding to produce CTRH-PLA and RRH-PLA composite specimens for the physico-mechanical properties testing. The tensile strength (TS) values of the CTRH-PLA composites were found to be much higher than RRH-PLA composites. The Tensile modulus (TM) and hardness values were also found to be improved for the CTRH-PLA composites compared to those of the RRH-PLA composites. The tensile fracture surface morphological features of CTRH-PLA composites, observed by scanning electron microscopy (SEM), revealed less micro voids and fibre agglomerates - indicating that better filler-matrix interfacial adhesion has occurred in case of CTRH rather than RRH with PLA. Water absorption (%) values were found to increase with increase in fibre content in the composite. However, CTRH-PLA composites showed lower water uptake capacity compared to those prepared from RRH. From the FTIR spectra of RRH and CTRH together with water absorption behavior of the composite specimens, it appeared that CTRH from RRH significantly reduced the hydrophilic nature of RRH, resulting in improved fibre-matrix interfacial adhesion. Key Words: Rice Husk, Polylactic Acid, Biocomposites, Ionic Liquid