Provocation on its own it not a total defense as to make the accused discharged of his guilt. It reduces murder to manslaughter. This essay considers the adequacy of this defense by examining it under the penal laws of Nigeria and different centers. The general requirement is that of the deceased must have been caused by accused upon provocation induced by the deceased himself and this must be offered before the accused had time for his passion to cool down. The injury inflicted must also be proportional and must be one as would have caused a reasonable man to resort to the same consequence. The adequate of this defense, in the light of the scope of this study is purely a psychological question. The test of provocation is inadequate. It is plainly illogical not to recognize the fact that different people react differently to stimuli and the law, by its hording expects a man dethroned in his reasoning faculty to inflict a reasonably proportional injury which only a reasonable man in his senses could do. The aim and objective of this work was to assess the meaning of the term provocation as provided for under the penal and criminal codes and other relevant statutes, case law and by various author, its nature, element and the condition under which the defense can avail a person from criminal liability.