The 2022–23 Thai League 2 is the 25th 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 18 teams will compete in the league. The season began on 12 August 2022 and is scheduled to conclude on 27 May 2023. For this season two teams in the final table (champion and runner up) directly promoted to Thai League 1 next season while teams ranked 3rd – 6th qualified in play off for last spot in top tier next season.