Processing of pigeon pea (Cajanus cajan L.) involves pre-treatment in order to loosen the hull, followed by dehulling. In this study, different pre-treatments were investigated and different parameters such as moisture gain, temperature change during different steps of processing and dehulled fractions were measured and analysed. The highest temperature observed after pre-treatment was 92.1°C and the lowest was 24.6°C, for hydrothermal and wet methods, respectively. It was found that the hydrothermally treated pigeon pea gave the highest amount of dehulled grains, followed by the dry method. There were higher amounts of brokens (17.6 g) in case of wet method and lower (6.2 g) in case of dry method. Hydrothermal treatment was found suitable when compared with other pre-treatments. Cooked samples were tested against a 9-point hedonic scale and hydrothermally treated samples were found to have better acceptability.