This is a list of player transfers involving Top 14 teams before or during the 2018–19 season. The list is of deals that are confirmed and are either from or to a rugby union team in the Top 14 during the 2017–18 season. It is not unknown for confirmed deals to be cancelled at a later date. Perpignan and Grenoble are promoted to the Top 14, whilst both Brive and Oyonnax are relegated to the Pro D2 for the 2018-19 season.