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The investigation of renewable energy sources is critical regarding the availability of energy in the future. This study was aimed to understand the potential of Cerbera manghas de-oiled seed by investigating the kinetic and thermodynamic parameters during the pyrolysis process. The de-oiled seed was obtained by the pressing of the seed at 33.8192 N/m2 to release its oil content. To find out the decomposition pattern of de-oiled seed, the thermal analyzer (Mettler Toledo TG-DSC1) was occupied where the mass loss of the sample was observed and recorded during the heating process from 25 up to 900 oC with a heating rate of 15 oC/min, and the nitrogen flow rate of 50 mL/min to prevent oxidation during temperature escalation. The kinetic parameters were studied using the Coats-Redfern method. The results showed that the de-oiled seed decomposed into three stages; the first stage occurs at temperatures of 25-178 oC, the second stage occurs at temperatures of 189-488 oC, and the third stage at temperatures of 500-900 oC, with the very low residue of 15.4 % was left over at the final thermal processes. The kinetics analysis resulted in the activation energy, reaction order, and pre-exponential factor of 27.42 kJ/mol, 0.94 and 68,64 min-1, respectively. Following the kinetic results then the thermodynamic parameters were analyzed and resulted in the values of Delta H (Enthalpy), Delta G (Free Gibbs energy), and Delta S (Entropy) that were 22,40 kJ/mol, 171,86 kJ/mol, and -0,2230 kJ/mol, respectively.