Agricultural vehicle for collecting and possibly processing fibrous and/or granular products or any other fodder for the purpose of distributing these, said agricultural vehicle being an autonomous agricultural vehicle extending along a longitudinal axis (X) and comprising, on one hand, a vehicle body comprising a receiving and mixing tank and a chassis supporting the tank , on the other hand, a picking-up and transporting unit comprising a picking-up head provided with a picking-up member for picking up the product, preferably a rotary picking-up member consisting of a rotary cutter, and a loading arm equipped with a transfer device that is able to transport said picked product to the tank and, on the other hand, means for bringing about and guiding a pivoting motion, the loading arm being mounted on the vehicle body and being able, by virtue of said means for bringing about and guiding a pivoting motion, to pivot in a vertical plane about a pivot axis that is horizontal and perpendicular to the main median plane (P) so as to allow the picking-up member to move vertically when the loading arm pivots, the agricultural vehicle being characterized - in that the overall width (L1) of the picking-up member is less than or equal to half the overall width (L2) of the vehicle body , said overall width (L1, L2) being defined as the maximum extent of the vehicle body , and respectively of the picking-up member , measured in units of length, in a direction perpendicular to the median plane, termed main median plane (P), of the agricultural vehicle containing its longitudinal axis (X), - in that it comprises means for bringing about and guiding a movement in translation, and in that the loading arm is mounted on the vehicle body , being able, by virtue of the means for bringing about and guiding a movement in translation, to move in translation in a transverse direction (T) that is perpendicular to the main median plane (P) so as to permit a transverse movement of the picking-up head and its picking-up member , that is to say in said transverse direction (T), between a first translational end position defined by a first median plane (P1), parallel to the main median plane (P), of the picking-up head or of the loading arm and a second translational end position defined by a second median plane (P2), parallel to the main median plane (P), of the picking-up head or of the loading arm . - in that the overall width (L1) of the picking-up member is less than or equal to half the overall width (L2) of the vehicle body , said overall width (L1, L2) being defined as the maximum extent of the vehicle body , and respectively of the picking-up member , measured in units of length, in a direction perpendicular to the median plane, termed main median plane (P), of the agricultural vehicle containing its longitudinal axis (X), - in that it comprises means for bringing about and guiding a movement in translation, and in that the loading arm is mounted on the vehicle body , being able, by virtue of the means for bringing about and guiding a movement in translation, to move in translation in a transverse direction (T) that is perpendicular to the main median plane (P) so as to permit a transverse movement of the picking-up head and its picking-up member , that is to say in said transverse direction (T), between a first translational end position defined by a first median plane (P1), parallel to the main median plane (P), of the picking-up head or of the loading arm and a second translational end position defined by a second median plane (P2), parallel to the main median plane (P), of the picking-up head or of the loading arm . <EOS>