| august 30 2017 |  M. Dadie |  Mainz 05 |  Banyule | RSD27 404 800 |
| august 24 2017 | K. Nasution | Mainz 05 |  [FS] Calcio Genk | RSD18 037 320 |
| august 24 2017 | F. Mboup | Mainz 05 |  FC OTB | RSD18 640 001 |
| august 24 2017 | T. Sartika | Mainz 05 |  Okinawa #2 | RSD21 489 001 |
| july 11 2017 |  V. Kaglnogl | Mainz 05 |  Liverpool FC Myanmar (On loan) | (RSD285 480) |
| july 11 2017 | C. Nitisastro | Mainz 05 |  Olsztyn #4 (On loan) | (RSD214 630) |
| july 3 2017 | T. Touré | Mainz 05 |  FC Labé | RSD13 398 883 |
| july 3 2017 | M. Amid | Mainz 05 |  fc atletico verdolaga | RSD26 666 880 |
| july 3 2017 | K. Sukarno | Mainz 05 |  曼联 | RSD14 404 001 |
| june 9 2017 | A. Sahnon | Mainz 05 |  C D San Miguel | RSD61 203 500 |
| may 19 2017 | T. Prawiranega | Mainz 05 | Real Madrid Club (On loan) | (RSD710 775) |
| may 18 2017 | V. Kaglnogl | Mainz 05 |  Vasco (On loan) | (RSD221 650) |
| may 18 2017 | C. Nitisastro | Mainz 05 |  FC Yylanly (On loan) | (RSD143 065) |
| may 17 2017 | N. Tay | Mainz 05 |  Gigis Team | RSD30 521 091 |
| may 13 2017 | G. Khoo | Mainz 05 |  Cienfuegos #2 | RSD46 710 000 |
| may 12 2017 | N. Rifqi | Mainz 05 |  FC Pointe-à-Pitre #5 | RSD18 298 400 |
| may 11 2017 | M. Mooloo | Mainz 05 |  Victoria Sport Baleni | RSD20 431 440 |
| may 11 2017 | G. Ang | Mainz 05 |  Tegucigalpa #5 | RSD42 042 077 |
| april 18 2017 |  B. Sibony | FC Asau | Mainz 05 | RSD86 726 000 |
| april 1 2017 | T. Prawiranega | Mainz 05 |  Zamaco (On loan) | (RSD1 193 183) |
| march 31 2017 | R. Khalish | Mainz 05 |  FC T'aichung #2 (On loan) | (RSD1 572 701) |
| march 30 2017 | A. El Hadary | 大大大东北 | Mainz 05 | RSD36 000 000 |
| march 30 2017 |  M. Antunes | Pingdingshan #3 | Mainz 05 | RSD72 122 400 |
| march 29 2017 | N. Tay | Mainz 05 | FC Funafuti (On loan) | (RSD446 420) |
| march 23 2017 | W. Amadi | Mainz 05 |  FC Chudand | RSD48 886 881 |
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