| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | Stefanos Kapino | 1994-03-18 | 196 | 90 | 2018 jun | ||
| D | Dimitrios Goutas | 1994-04-04 | 189 | ||||
| D | Diogo Figueiras | 1991-07-01 | 168 | 62 | |||
| D | Hrvoje Milic | 1989-05-10 | 183 | 74 | |||
| M | Alaixys Romao | 1984-01-18 | 180 | 74 | 2018-06-30 | ||
| M | Andre Martins | 1990-01-21 | 166 | 56 | 2019-06-30 | ||
| M | Esteban Cambiasso | 1980-08-18 | 177 | 73 | |||
| M | Guillaume Gillet | 1984-03-09 | 186 | 77 | |||
| M | Marko Marin | 1989-03-13 | 170 | 63 | 2019-06-30 | ||
| M | Panagiotis Tachtsidis | 1991-02-15 | 191 | 86 | 2019-06-30 | ||
| F | Brown Ideye | 1988-10-10 | 180 | 70 | 2017-06-30 | ||
| F | Felipe Pardo | 1990-08-17 | 178 | 73 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 31.Jan | Tarik Elyounoussi (F) | Olympiakos SP Piraeus | AIK | Confirmed | |
| 30.Jun | Juan Carlos Paredes (D) | Olympiakos SP Piraeus | Watford FC | Confirmed | |
| 30.Jun | Omar Elabdellaoui (D) | Hull City AFC | Olympiakos SP Piraeus | Confirmed | |
| 30.Jun | Pajtim Kasami (M) | Nottingham Forest | Olympiakos SP Piraeus | Confirmed | |
| 30.Jun | Aly Cissokho (D) | Olympiakos SP Piraeus | Aston Villa FC | Confirmed | |
| 31.Jan | Luka Milivojevic (M) | Olympiakos SP Piraeus | Crystal Palace | Confirmed | |
| 31.Jan | Juan Carlos Paredes (D) | Watford FC | Olympiakos SP Piraeus | Confirmed | |
| 20.Jan | Omar Elabdellaoui (D) | Olympiakos SP Piraeus | Hull City AFC | Confirmed | |
| 16.Jan | Aly Cissokho (D) | Aston Villa FC | Olympiakos SP Piraeus | Confirmed | |
| 12.Jan | Felipe Pardo (F) | Olympiakos SP Piraeus | FC Nantes | Confirmed |