2018 Thai League 2

The 2018 Thai League 2 is the 21st season of the Thai League 2, the second-tier professional league for Thailand's association football clubs, since its establishment in 1997, also known as M-150 Championship due to the sponsorship deal with M-150. A total of 15 teams will compete in the league. The season began on 9 February 2018 and is scheduled to conclude on 29 September 2018.

Chainat Hornbill are the defending champions, while Samut Sakhon, Khonkaen and Udon Thani have entered as the promoted teams from the 2017 Thai League 3.

From Thai League 2

 * Promoted to 2018 Thai League
 * Chainat Hornbill
 * Air Force Central
 * PT Prachuap


 * Relegated to 2018 Thai League 3
 * Bangkok


 * Relegated to 2018 Thai League 4
 * Nakhon Pathom United
 * Samut Songkhram

To Thai League 2

 * Relegated from 2017 Thai League
 * Thai Honda
 * Sisaket
 * Super Power Samut Prakan


 * Promoted from 2017 Thai League 3
 * Samut Sakhon
 * Khonkaen
 * Udon Thani

Renamed clubs

 * Super Power Samut Prakan authorize from Jumpasri United
 * Thai Honda Ladkrabang was renamed to Thai Honda

Expansion clubs

 * Nakhon Pathom United and Samut Songkhram Club-licensing football club didn't pass to play 2018 Thai League 2. This team were relegated to 2018 Thai League 4 Western Region.
 * Songkhla United Club-licensing football club didn't pass to play 2018 Thai League 3 Lower Region. This team is banned 2 years and Relegated to 2020 Thai League 4 Southern Region.
 * Jumpasri United Club-licensing football club didn't pass to play 2018 Thai League 2. This team is banned 2 years and Relegated to 2020 Thai League 4 North Eastern Region.

Foreign players
A T2 team could registered five foreign players by at least one player from AFC member countries and at least one player from ASEAN member countries. A team can use four foreign players on the field in each game, including at least one player from the AFC member countries or ASEAN member countries (3+1). ↔: players who have dual nationality by half-caste or naturalization.
 * Note :
 * players who released during summer transfer window;
 * players who registered during summer transfer window.

Top scorers

 * As of 29 September 2018.

Attendance by home match played
Source: Thai League 2