This is a list of Polish football transfers in the 2017 summer transfer window by club. Only clubs in the 2017–18 Ekstraklasa are included.
Ekstraklasa
Arka Gdynia
In:
Out:
Bruk-Bet Termalica Nieciecza
In:
Out:
Cracovia
In:
Out:
Górnik Zabrze
In:
Out:
Jagiellonia Białystok
In:
Out:
Korona Kielce
In:
Out:
Lech Poznań
In:
Out:
Lechia Gdańsk
In:
Out:
Legia Warsaw
In:
Out:
Piast Gliwice
In:
Out:
Pogoń Szczecin
In:
Out:
Sandecja Nowy Sącz
In:
Out:
Śląsk Wrocław
In:
Out:
Wisła Kraków
In:
Out:
Wisła Płock
In:
Out:
Zagłębie Lubin
In:
Out:
References