Logging in the Democratic Republic of Congo remains of selective type characterized at each step by prevailing losses of timber wood. In order to enable the Société de Développement Forestier (SODEFOR) setting up a system of maximum recovery of timber, the major logged tree species, the harvest index (coefficient) of felled trees and the loss of merchant logs were assessed in the forest blocks 91 and 95 of the Nteno concession at Oshwe. SODEFOR has so far mainly exploited 21 tree species of which 7 making up 33% are subjected to intensive logging. These are Millettia laurentii, Guibourtia demeusei, Pterocarpus soyauxii, Staudtia kamerunensis, Prioria oxyphylla, Canarium schweinfurthii and Copaifera mildbraedii. The harvest index of these tree species varied from 6% for Canarium schweinfurthii to 113% for Guibourtia demeusei. This recovery rate was influenced by both the market requirements as well as the density and exploitability size (dimension) of each tree species. Over total wood volume of a felled tree, including that of branches of at least 35 cm diameter, nearly 75% were merchantable while 25% were wasted in forest. For Millettia laurentii, the rate of recovery was the lowest at 64% against 82% recorded in Prioria balsamifera.