The 2023–24 Thai FA Cup is the 30th season of a Thailand's knockout football competition. The tournament was sponsored by Chang, and known as the Chang FA Cup () for sponsorship purposes. The tournament is organized by the Football Association of Thailand. 95 clubs were accepted into the tournament, and it began with the qualification round on 4 October 2023 and concluded with the final on TBD. The winner would have qualified for the 2024–25 AFC Champions League Elite qualifying play-off and the 2024 Thailand Champions Cup.
Calendar
Results
Note: T1: Clubs from Thai League 1; T2: Clubs from Thai League 2; T3: Clubs from Thai League 3; TS: Clubs from Thailand Semi-Pro League; TA: Clubs from Thailand Amateur League.
Qualification round
There were 11 clubs from 2023–24 Thai League 2, 24 clubs from 2023–24 Thai League 3, 3 clubs from Thailand Semi-Pro League, and 24 clubs from Thailand Amateur League that have signed to qualify for 2023–24 Thai FA cup. This round was drawn on 1 September 2023. 123 goals occurred in this round.
First round
The second round would feature 31 clubs that were the winners of the first round including 10 clubs from T2, 13 clubs from T3, 2 clubs from TS, and 6 clubs from TA and the new entries that were 16 clubs from 2023–24 Thai League 1, 2 clubs from 2023–24 Thai League 2, 7 clubs from 2023–24 Thai League 3, 1 club from Thailand Semi-Pro League, and 7 clubs from Thailand Amateur League. This round was drawn on 12 October 2023.