A plug connector arrangement having a plug connector and a cable connected thereto, with at least one conductor pair for transmitting a differential signal, wherein the conductors of the conductor pair have a first mutual spacing (X) in a sheathed cable section, diverge in an expansion section in the direction of the plug connector, and have a larger second mutual spacing (Y) in a guide section of the plug connector, wherein a sleeve part at least partially surrounding the conductor pair in the expansion section is provided to exert pressure on the conductors of the conductor pair at least in sections, in order to reduce the spacing therebetween.