This is a list of player transfers involving RFU Championship teams before or during the 2017–18 season.
The list is of deals that are confirmed and are either from or to a rugby union team in the Championship during the 2016–17 season.
On 7 December 2016, London Welsh announced that it is going into voluntary liquidation due to an "unsustainable" financial situation.
[2] On 24 May 2017, London Irish are promoted into the Premiership, whilst Bristol are demoted back to the Championship for the 2017–18 season.
[3] It is not unknown for confirmed deals to be cancelled at a later date.