Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2017 |  | Woong-hee Lee | DF |  | Gimcheon Sangmu | Gimcheon Sangmu |
| 08/2017 | | Hee-seong Park | FW | | Gimcheon Sangmu | Gimcheon Sangmu |
| 07/2017 | | Jin-hyung Song | MF |  | Sharjah FC | Sharjah FC |
| 07/2017 |  | Khaled Shafiei | DF |  | Tractor Sazi | Tractor Sazi |
| 07/2017 | | Myung-joo Lee | MF |  | Al Ain FC | Al Ain FC |
| 07/2017 |  | Ivan Kovačec | FW |  | Ulsan HD FC | Ulsan HD FC |
| 01/2017 | | Ki-wook Hwang | DF | |||
| 01/2017 | | Kun-hoan Kim | DF |  | Suwon FC | Suwon FC |
| 01/2017 | | Won-gun Kim | DF |  | Gangwon FC | Gangwon FC |
| 01/2017 | | Ming-yu Park | DF | |||
| 01/2017 | | Kwang-hoon Shin | DF |  | Pohang Steelers | Pohang Steelers |
| 01/2017 | | Jong-gyu Yoon | DF | |||
| 01/2017 | | Dae-sung Ha | MF |  | Nagoya Grampus | Nagoya Grampus |
| 01/2017 | | Han-gil Kim | MF | |||
| 01/2017 | | Sang-ho Lee | FW |  | Suwon Bluewings | Suwon |
| 01/2017 |  | Maurinho | FW |  | Jeonnam Dragons | Jeonnam Dragons |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2017 | | Ki-wook Hwang | DF |  | Tubize-Braine | AFC Tubize |
| 07/2017 | | Maurinho | FW |  | Avaí - SC | Avaí |
| 07/2017 | | Dong-woo Kim | DF |  | Daegu FC | Daegu FC |
| 07/2017 | | Kun-hoan Kim | DF |  | Gyeongnam FC | Gyeongnam FC |
| 01/2017 |  | Yojiro Takahagi | MF |  | FC Tokyo | FC Tokyo |
| 01/2017 | | Gyo-Jin Keum | DF |  | Seoul E-Land FC | Seoul E-Land FC |
| 01/2017 | | Sang-hun Yu | GK | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2017 | | Nam-chun Kim | DF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2017 | | Hyun-tae Choi | MF |  | Jeju SK FC | Jeju SK FC |
| 01/2017 | | Kwang-min Ko | MF |  | Hwaseong FC | Hwaseong FC |
| 01/2017 | | Sang-hyeob Lee | MF |  | Incheon United | Incheon United |
| 01/2017 | | Yong-woo Park | MF | | Ulsan HD FC | Ulsan HD FC |
| 01/2017 | | Ju-tae Yun | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 01/2017 | | Min-jun Kim | FW | | Gyeongnam FC | Gyeongnam FC |
| 01/2017 | | Je-Hyuk Shim | FW |  | Seongnam FC | Seongnam FC |