Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2018 |  | Pil-soo Choi | GK |  | Gimcheon Sangmu | Gimcheon Sangmu |
| 07/2018 | | Seung-hyun Hong | DF |  | Daegu FC | Daegu FC |
| 03/2018 | | Ho-jung Choi | MF |  | Seoul E-Land FC | Seoul E-Land FC |
| 02/2018 | | Woo-yeon Sim | DF |  | FC Seoul | FC Seoul |
| 01/2018 | | Dong-won Yang | GK |  | Seongnam FC | Seongnam FC |
| 01/2018 | | Hee-woong Jeong | FW | | Seoul E-Land FC | Seoul E-Land FC |
| 01/2018 | | Min-ki Jeong | GK | |||
| 01/2018 | | Su-hyeon Jeon | GK |  | Daejeon Hana Citizen | Daejeon |
| 01/2018 |  | Wesley Alex | FW | | Seoul E-Land FC | Seoul E-Land FC |
| 01/2018 | | Young-chan Kim | DF |  | Jeonbuk FC | Jeonbuk |
| 01/2018 | | Eun-kyu Jang | MF | | Seongnam FC | Seongnam FC |
| 01/2018 | | Marcos | MF |  | CSA - AL | CSA |
| 01/2018 | | Bruno Cantanhede | FW | | Daejeon Hana Citizen | Daejeon |
| 01/2018 |  | Michael Kim | AS-CO |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 05/2018 | | Eun-kyu Jang | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2018 | | Tae-ahn Kwon | GK | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2018 | | Jin-beom An | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2018 | | Hyun-Woong Lee | MF |  | Gyeongnam FC | Gyeongnam FC |
| 01/2018 | | Hyo-gi Kim | FW | | Gyeongnam FC | Gyeongnam FC |
| 01/2018 | | Lukian | FW |  | Samut Prakan City FC | Pattaya United |