Device for grouping into batches fragile floating objects, in particular floating fruits, comprising: - a plurality of channels, named accumulation channels, which are connected to a hydraulic supply device which is adapted to form, in each accumulation channel, a hydraulic current which is capable of transporting the floating objects along the accumulation channel, each accumulation channel being provided, at a downstream end thereof, with a device for retaining/releasing the objects which it contains, - a selective supply device for supplying an upstream portion of each accumulation channel with objects, this selective supply device comprising at least one line, named a calibration line, for conveying, analyzing and sorting the objects in accordance with predetermined criteria, said calibration line comprising means for selective discharge of the objects in the different accumulation channels, and wherein: - each accumulation channel has, at least in a downstream portion thereof, named the stacking zone, a height which is greater than twice the maximum vertical spatial requirement of each object in order to be able to receive several layers of objects, - each accumulation channel is provided with a device, named a staking device, which is capable of staking the objects in several layers in the stacking zone, characterized in that said staking device of each accumulation channel comprises at least one motorized pushing member which is arranged upstream of the stacking zone and which is capable of moving in a downstream direction the objects which arrive at a location upstream of the stacking zone of the accumulation channel, independently of the hydraulic current and over a distance which is less than the total distance which separates it from the retention/release device, but greater than a maximum spatial requirement of an object in the horizontal direction, comprising a transverse grid which is mounted on a carriage which is movingly guided above the accumulation channel, a device for longitudinally driving this carriage alternately in a downstream direction over said distance, and in an upstream direction over the same distance, and a device for driving the transverse grid between a position lowered in the accumulation channel in which it is capable of pushing the objects in a downstream direction, and a position raised above the accumulation channel, said pushing member is articulated to the carriage along a transverse horizontal articulation axis in order to be able to be placed either in a position raised above the accumulation channel in which it does not interfere with the objects which are circulating in the accumulation channel, or in a position lowered into the accumulation channel in which it interferes with the objects located in the hydraulic current circulating in the accumulation channel in order to obtain stacking of the objects in the stacking zone against the closed retention/release device. - a plurality of channels, named accumulation channels, which are connected to a hydraulic supply device which is adapted to form, in each accumulation channel, a hydraulic current which is capable of transporting the floating objects along the accumulation channel, each accumulation channel being provided, at a downstream end thereof, with a device for retaining/releasing the objects which it contains, - a selective supply device for supplying an upstream portion of each accumulation channel with objects, this selective supply device comprising at least one line, named a calibration line, for conveying, analyzing and sorting the objects in accordance with predetermined criteria, said calibration line comprising means for selective discharge of the objects in the different accumulation channels, - each accumulation channel has, at least in a downstream portion thereof, named the stacking zone, a height which is greater than twice the maximum vertical spatial requirement of each object in order to be able to receive several layers of objects, - each accumulation channel is provided with a device, named a staking device, which is capable of staking the objects in several layers in the stacking zone,