Panathinaikos Football Club B, known as Panathinaikos B, (Greek: ΠΑΕ Παναθηναϊκός B) was a Greek football club based in Athens, Greece.

Founded in 2021, they play as the reserve team of Panathinaikos in the Super League Greece 2.

Panathinaikos B was one of four reserve teams givens approval from the EPO (Hellenic Football Association) to play in the second division.

[1] Panathinaikos B was helped young footballers get promoted to the team of Panathinaikos Athens.