This is a list of Italian football transfers featuring at least one Serie A or Serie B club which were completed in the winter of the 2017–18 season.
[1] The winter transfer window opened on 3 January 2018, although a few transfers were made official prior to that date.
The window closed at midnight on 31 January 2018.
[2] Free agents can join a club at any time, either during or in between transfer windows, as long as the team registers them.