Summary. Why this study about snake-bites among the Mekeo of P.N.G. ? Because having the opportunity to work in a bush hospital in the Mekeo district, we noticed the outstanding importance of this accident in the life of this tribe. And the striking point among the Mekeo is that the bite is related to sorcery and considered to be the sorcerer 's aggression — through the snake — against a peculiar individual. So we tried — to make a correlation between the medical point of view of this accident and a view more cultural, more anthropological of what is regarded as an aggression — and to study the progress of the events occuring during a snake-bite.