Aircraft cable tray including: a profile section delimiting at least one cable guiding channel; a lateral lip having: a fixing through-orifice; an upper bearing surface which surrounds the fixing through-orifice; a lower bearing surface which surrounds the fixing through-orifice; a cable retention device (4) having: a base (7) equipped with a leg (8) inserted into the fixing through-orifice and including stop surfaces (18,20) positioned against the lower bearing surface and against the upper bearing surface; a piston (12) having a rod (10) immobilized relative to the base (7), this rod (10) being equipped at one of its ends with a foot (11) positioned in the cable guide channel.