Swimming pool water filtration device (2; 110) comprising: - at least two orifices, respectively a suctioning orifice for the water and a recirculating orifice for the filtered water, - at least three hydrocyclones, each forming a cyclonic filter capable of separating the water from solid particles contained in this water, said hydrocyclones being arranged in a circle to delimit a substantially cylindrical internal space which extends along a central axis, - a pump in fluidic connection with the suctioning orifice via a conduit, and - a distributor capable of collecting the water recirculated by the pump and introducing the water into the hydrocyclones, said distributor comprising at least one distribution channel for each hydrocyclone, each channel extending in a plane perpendicular to the central axis, from an inlet orifice formed in a central circular housing to an outlet orifice formed in a wall of a hydrocyclone, each channel discharging into the hydrocyclone tangentially to the wall of this hydrocyclone, characterized in that the pump is housed inside the substantially cylindrical space, said pump comprising: • a centrifugal turbine comprising an axis of rotation merged with the central axis, capable of removing water from the swimming pool in a direction parallel to the axis of rotation and recirculating said water in directions perpendicular to the axis of rotation, the centrifugal turbine being housed inside the central housing of the distributor, opposite the inlet orifices of the channels, and • an electric motor capable of driving the turbine in rotation. - at least two orifices, respectively a suctioning orifice for the water and a recirculating orifice for the filtered water, - at least three hydrocyclones, each forming a cyclonic filter capable of separating the water from solid particles contained in this water, said hydrocyclones being arranged in a circle to delimit a substantially cylindrical internal space which extends along a central axis, - a pump in fluidic connection with the suctioning orifice via a conduit, and - a distributor capable of collecting the water recirculated by the pump and introducing the water into the hydrocyclones, said distributor comprising at least one distribution channel for each hydrocyclone, each channel extending in a plane perpendicular to the central axis, from an inlet orifice formed in a central circular housing to an outlet orifice formed in a wall of a hydrocyclone, each channel discharging into the hydrocyclone tangentially to the wall of this hydrocyclone, characterized in that the pump is housed inside the substantially cylindrical space, said pump comprising: • a centrifugal turbine comprising an axis of rotation merged with the central axis, capable of removing water from the swimming pool in a direction parallel to the axis of rotation and recirculating said water in directions perpendicular to the axis of rotation, the centrifugal turbine being housed inside the central housing of the distributor, opposite the inlet orifices of the channels, and • an electric motor capable of driving the turbine in rotation. • a centrifugal turbine comprising an axis of rotation merged with the central axis, capable of removing water from the swimming pool in a direction parallel to the axis of rotation and recirculating said water in directions perpendicular to the axis of rotation, the centrifugal turbine being housed inside the central housing of the distributor, opposite the inlet orifices of the channels, and • an electric motor capable of driving the turbine in rotation.