The ways in which people in the West Papuan Highlands are hunting can provide useful informations about their relation with forest environment. The activities of the Yali from the village of Holuwon, in the Heluk valley, are essentially for agriculture, but hunting still has an important role for the local management of the forest. The hunting practises are described here to understand this aspect of the technical system. For each kind of hunting practice, we study the making-techniques, the plants used for every practice, and the types of games that are hunted by each method.