Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2018 |  | Yong-soo Choi | MA | |||
| 09/2018 | | Sang-hun Yu | GK |  | Gimcheon Sangmu | Gimcheon Sangmu |
| 09/2018 | | Nam-chun Kim | DF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 09/2018 | | Ju-tae Yun | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 08/2018 | | Won-jin Jung | FW |  | Pohang Steelers | Pohang Steelers |
| 07/2018 |  | Bojan Matić | FW |  | Mačva Šabac | Mačva Šabac |
| 07/2018 | | Suk-young Yun | DF |  | Kashiwa Reysol | Kashiwa Reysol |
| 05/2018 | | Eul-yong Lee | MA | |||
| 02/2018 |  | Anderson Lopes | FW |  | Tombense - MG | Tombense |
| 01/2018 | | Seong-jun Kim | MF |  | Seongnam FC | Seongnam FC |
| 01/2018 | | Jin-wook Jung | GK | |||
| 01/2018 | | Moo-bin Son | GK | |||
| 01/2018 | | Ki-wook Hwang | DF |  | Tubize-Braine | AFC Tubize |
| 01/2018 | | Ho-jun Jeon | DF | |||
| 01/2018 | | Dong-woo Kim | DF |  | Daegu FC | Daegu FC |
| 01/2018 | | Dong-jin Park | DF |  | Gwangju FC | Gwangju FC |
| 01/2018 | | Joon-young Park | DF |  | Kwangwoon University | Kwangwoon University |
| 01/2018 | | Hyeon-cheol Jeong | MF |  | Gyeongnam FC | Gyeongnam FC |
| 01/2018 | | Jin-ho Shin | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2018 | | Young-wook Cho | FW |  | Korea University | Korea Universit |
| 01/2018 | | Evandro | FW | | Daegu FC | Daegu FC |
| 01/2018 | | Min-jun Kim | FW | | Gyeongnam FC | Gyeongnam FC |
| 01/2018 | | Woo-hong Kim | FW | |||
| 01/2018 | | Sung-min Park | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2018 |  | Ivan Kovačec | FW |  | NK Rudeš | NK Rudeš |
| 08/2018 | | Seok-hyun Lee | MF | | Pohang Steelers | Pohang Steelers |
| 02/2018 |  | Osmar | DF |  | Cerezo Osaka | Cerezo |
| 02/2018 | | Woo-yeon Sim | DF |  | FC Anyang | FC Anyang |
| 01/2018 | | Chol-ho Kim | GK |  | Kyoto Sanga FC | Kyoto |
| 01/2018 | | Chi-woo Kim | DF |  | Busan IPark | Busan IPark |
| 01/2018 |  | Khaled Shafiei | DF |  | FC Zob Ahan | FC Zob Ahan |
| 01/2018 | | Se-jong Ju | MF |  | Asan Mugunghwa FC | AMFC |
| 01/2018 | | Min-hyeok Lim | MF | | Gwangju FC | Gwangju FC |
| 01/2018 |  | Dejan Damjanović | FW |  | Suwon Bluewings | Suwon |
| 01/2018 | | Jeong-hwan Kim | FW | | Gwangju FC | Gwangju FC |
| 01/2018 | | Il-lok Yun | FW |  | Yokohama F. Marinos | Marinos |