Abstract: The prospections undertaken in the center province of Cameroon permitted to study the biodiversity of psyllids of the Psyllidae family. The psyllids were sampled during a period of 24 months (January 2006-December 2007) in different localities on various host plants. The damages caused by the psyllids on their host plants were recorded and photographed. This survey documented 45 species belonging to 24 genera and 7 subfamilies. Nine genera and 36 species remain undescribed. The proliferation period of each species depends on the phenology of host plants. In the center region of Cameroon, the Fabaceae constitutes the family with the largest number of associated psyllid species. The present survey permitted to enrich the biodiversity of the psyllids of the Psyllidae family. It is important to study the taxonomy of undescribed psyllids species and the bionomic of these psyllids, pests of cultivated plants and commercial timbers in the center region of Cameroon.