The invention concerns a mobile load compartment (3) for logs from young forest during thinning and intended to be coupled in a jointed manner behind a harvester of the type that demonstrates a front assembly (1A) and a rear assembly (1 B) that are united through a joint (8) in a manner that allows pivoting and where the rear assembly is equipped with a driver's cabin (2) and the front assembly with a crane (10) that can be rotated around a vertical axis (Z1 ) and, supporting a harvester unit (20), can be used for the gripping and handling of logs, a loading arrangement arranged at the said mobile compartment and including a timber receiver (26) in order to receive the said logs and support them in a retaining manner. In order to obtain a higher degree of exploitation, a loading arrangement is arranged to receive a log directly from the harvester unit (20) and to retain it, and - independently of the motion of the harvester unit - to carry out displacement using the crane (10) of a delivered log to a position in and above the said mobile load compartment (3), whereby the loading arrangement is arranged to receive a log from a position within the working area (25) of the harvester unit in front of or at the side of the front assembly (1 A) of the harvester.L'invention concerne un compartiment de charge mobile (3) pour grumes provenant de jeunes peuplements au cours de la coupe d'éclaircie et destiné à être relié de manière articulée à l'arrière d'un engin d'abattage du type comportant un ensemble avant (1A) et un ensemble arrière (1 B) qui sont reliés par le biais d'une articulation (8) d'une manière qui permet le pivotement, et l'ensemble arrière étant équipé d'une cabine de commande (2), et l'ensemble avant d'une grue (10) pouvant pivoter autour d'un axe vertical (Z1) et porteuse d'une unité d'abattage (20), pouvant être utilisée pour la préhension et la manipulation de grumes, un ensemble de chargement disposé au niveau dudit compartiment mobile et comprenant un r
