Antalyaspor finished fifth in the 2014/2015 Turkish second-flight, but won promotion via the play-offs.
Clearly intent on making an impact in the Super Lig, Antalyaspor sent a private jet to Italy with executives to negotiate with Eto'o and then bring him back to Turkey.
"An agreement has been reached in principle with the footballer Samuel Eto'o," Antalyaspor said in a statement. Financial details have not yet been disclosed.
The coach of the Antalya club in the popular Mediterranean resort, Yusuf Simsek, described the transfer of Eto'o as "very good and very useful".