| Date | Player | From | To | Type / Fee |
|---|---|---|---|---|
| Jul 1, 2018 | Bernd Leno |  Bayer Leverkusen |  Arsenal | Transfer €25M |
| Jul 1, 2018 | Dejan Iliev |  Arsenal Academy | Arsenal | Transfer |
| Jun 30, 2018 | Emiliano Martinez |  Getafe | Arsenal | End of loan |
| Jun 30, 2018 | Joel Campbell |  Real Betis | Arsenal | End of loan |
| Jun 30, 2018 | Chuba Akpom |  St.Truiden | Arsenal | End of loan |
| Jun 30, 2018 | Lucas Perez |  Deportivo de A Coruna | Arsenal | End of loan |
| Jun 30, 2018 | Takuma Asano |  VfB Stuttgart | Arsenal | End of loan |
| May 31, 2018 | Carl Jenkinson |  Birmingham | Arsenal | End of loan |
| May 31, 2018 | Krystian Bielik |  Walsall | Arsenal | End of loan |
| Jan 31, 2018 | Olivier Giroud | Arsenal |  Chelsea | Transfer €17M |
| Jan 31, 2018 | Pierre-Emerick Aubameyang |  Borussia Dortmund | Arsenal | Transfer €63.8M |
| Jan 31, 2018 | Chuba Akpom | Arsenal | St.Truiden | Loan |
| Jan 31, 2018 | Krystian Bielik | Arsenal | Walsall | Loan |
| Jan 22, 2018 | Henrikh Mkhitaryan |  Manchester United | Arsenal | Transfer €34M |
| Jan 22, 2018 | Alexis Sanchez | Arsenal | Manchester United | Transfer €34M |
| Jan 11, 2018 | Francis Coquelin | Arsenal |  Valencia | Transfer €14M |
| Jan 4, 2018 | Konstantinos Mavropanos |  PAS Giannina | Arsenal | Transfer €2.1M |
| Aug 31, 2017 | Alex Oxlade-Chamberlain | Arsenal |  Liverpool | Transfer €38M |
| Aug 31, 2017 | Joel Campbell | Arsenal | Real Betis | Loan |
| Aug 31, 2017 | Lucas Perez | Arsenal | Deportivo de A Coruna | Loan |
| Aug 21, 2017 | Carl Jenkinson | Arsenal | Birmingham | Loan |
| Aug 18, 2017 | Gabriel Paulista | Arsenal | Valencia | Transfer €11M |
| Aug 2, 2017 | Emiliano Martinez | Arsenal | Getafe | Loan |
| Jul 19, 2017 | Wojciech Szczesny | Arsenal |  Juventus | Transfer €18M |
| Jul 7, 2017 | Yaya Sanogo | Arsenal |  Toulouse | Free transfer |
