Group B was one of the two groups of the 2018 AFF Championship. It consisted of Thailand, Indonesia, the Philippines, Singapore and qualification round winners Timor-Leste. The matches were played from 9 to 25 November 2018.
| Draw position | Team | Appearance | Previous best performance  | FIFA World Rankings (as of 25 October) [1] | 
|---|---|---|---|---|
| B1 | 12th | Winners (1996, 2000, 2002, 2014, 2016) | 121 | |
| B2 | 12th | Runners-up (2000, 2002, 2004, 2010, 2016) | 160 | |
| B3 | 11th | Semi-finalists (2010, 2012, 2014) | 116 | |
| B4 | 12th | Winners (1998, 2004, 2007, 2012) | 165 | |
| QFW | 2nd | Group stage (2004) | 191 | 
| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Qualification | 
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | 3 | 1 | 0 | 15 | 3 | +12 | 10 | Knockout phase | |
| 2 | 4 | 2 | 2 | 0 | 5 | 3 | +2 | 8 | ||
| 3 | 4 | 2 | 0 | 2 | 7 | 5 | +2 | 6 | ||
| 4 | 4 | 1 | 1 | 2 | 5 | 6 | −1 | 4 | ||
| 5 | 4 | 0 | 0 | 4 | 4 | 19 | −15 | 0 | 
In the semi-finals:
Singapore  | Indonesia  | 
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 Man of the Match:  Assistant referees: [4]   | 
| Statistics | Singapore | Indonesia | 
|---|---|---|
| Goals scored | 1 | 0 | 
| Total shots | 10 | 5 | 
| Shots on target | 4 | 1 | 
| Ball possession | 38% | 62% | 
| Corner kicks | 4 | 3 | 
| Fouls committed | 24 | 17 | 
| Offsides | 1 | 4 | 
| Yellow cards | 1 | 2 | 
| Red cards | 0 | 1 | 
|  Timor-Leste   | 0–7 | |
|---|---|---|
|  Report (AFFSZ)  Report (AFF)  |  Adisak  Supachai  | 
Timor-Leste  | Thailand  | 
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 Man of the Match:  Assistant referees: [8]   | 
| Statistics | Timor-Leste | Thailand | 
|---|---|---|
| Goals scored | 0 | 7 | 
| Total shots | 16 | 13 | 
| Shots on target | 8 | 9 | 
| Ball possession | 45% | 55% | 
| Corner kicks | 7 | 5 | 
| Fouls committed | 14 | 6 | 
| Offsides | 0 | 2 | 
| Yellow cards | 2 | 0 | 
| Red cards | 1 | 0 | 
|  Indonesia   | 3–1 | |
|---|---|---|
|  Alfath  Lilipaly Beto  |  Report (AFFSZ)  Report (AFF)  |  Gama  | 
Indonesia  | Timor-Leste  | 
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 Man of the Match:  Assistant referees: [12]   | 
| Statistics | Indonesia | Timor-Leste | 
|---|---|---|
| Goals scored | 3 | 1 | 
| Total shots | 18 | 14 | 
| Shots on target | 4 | 5 | 
| Ball possession | 64% | 36% | 
| Corner kicks | 7 | 5 | 
| Fouls committed | 11 | 16 | 
| Offsides | 3 | 1 | 
| Yellow cards | 1 | 3 | 
| Red cards | 0 | 0 | 
Philippines  | Singapore  | 
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 Man of the Match:  Assistant referees: [16]   | 
| Statistics | Philippines | Singapore | 
|---|---|---|
| Goals scored | 1 | 0 | 
| Total shots | 11 | 7 | 
| Shots on target | 3 | 0 | 
| Ball possession | 62% | 38% | 
| Corner kicks | 2 | 3 | 
| Fouls committed | 15 | 19 | 
| Offsides | 2 | 1 | 
| Yellow cards | 0 | 2 | 
| Red cards | 0 | 0 | 
|  Timor-Leste   | 2–3 | |
|---|---|---|
|  Reis  João Pedro  |  Report (AFFSZ)  Report (AFF)  |  P. Younghusband  Steuble De Murga  | 
Timor-Leste  | Philippines  | 
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 Man of the Match:  Assistant referees: [20]   | 
| Statistics | Timor-Leste | Philippines | 
|---|---|---|
| Goals scored | 2 | 3 | 
| Total shots | 10 | 19 | 
| Shots on target | 5 | 5 | 
| Ball possession | 33% | 67% | 
| Corner kicks | 6 | 8 | 
| Fouls committed | 16 | 12 | 
| Offsides | 1 | 3 | 
| Yellow cards | 2 | 2 | 
| Red cards | 0 | 0 | 
|  Thailand   | 4–2 | |
|---|---|---|
|  Korrakot  Pansa Adisak Pokklaw  |  Report (AFFSZ)  Report (AFF)  |  Zulfiandi  Fachrudin  | 
Thailand  | Indonesia  | 
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 Man of the Match:  Assistant referees: [24]   | 
| Statistics | Thailand | Indonesia | 
|---|---|---|
| Goals scored | 4 | 2 | 
| Total shots | 16 | 15 | 
| Shots on target | 8 | 8 | 
| Ball possession | 50% | 50% | 
| Corner kicks | 8 | 12 | 
| Fouls committed | 5 | 11 | 
| Offsides | 1 | 0 | 
| Yellow cards | 0 | 3 | 
| Red cards | 0 | 0 | 
|  Philippines   | 1–1 | |
|---|---|---|
|  Bedic  |  Report (AFFSZ)  Report (AFF)  |  Supachai  | 
Philippines  | Thailand  | 
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 Man of the Match:  Assistant referees: [28]   | 
| Statistics | Philippines | Thailand | 
|---|---|---|
| Goals scored | 1 | 1 | 
| Total shots | 18 | 6 | 
| Shots on target | 5 | 2 | 
| Ball possession | 59% | 41% | 
| Corner kicks | 3 | 5 | 
| Fouls committed | 19 | 6 | 
| Offsides | 2 | 5 | 
| Yellow cards | 2 | 3 | 
| Red cards | 0 | 0 | 
|  Singapore   | 6–1 | |
|---|---|---|
|  Safuwan  Ikhsan Faris  |  Report (AFFSZ)  Report (AFF)  |  Gama  | 
Singapore  | Timor-Leste  | 
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 Man of the Match:  Assistant referees: [32]   | 
| Statistics | Singapore | Timor-Leste | 
|---|---|---|
| Goals scored | 6 | 1 | 
| Total shots | 35 | 6 | 
| Shots on target | 14 | 1 | 
| Ball possession | 58% | 42% | 
| Corner kicks | 12 | 2 | 
| Fouls committed | 17 | 15 | 
| Offsides | 3 | 5 | 
| Yellow cards | 1 | 2 | 
| Red cards | 0 | 0 | 
|  Thailand   | 3–0 | |
|---|---|---|
|  Pansa  Supachai Adisak  |  Report (AFFSZ)  Report (AFF)  | 
Thailand  | Singapore  | 
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 Man of the Match:  Assistant referees: [36]   | 
| Statistics | Thailand | Singapore | 
|---|---|---|
| Goals scored | 3 | 0 | 
| Total shots | 12 | 12 | 
| Shots on target | 8 | 4 | 
| Ball possession | 45% | 55% | 
| Corner kicks | 9 | 4 | 
| Fouls committed | 10 | 19 | 
| Offsides | 4 | 0 | 
| Yellow cards | 0 | 4 | 
| Red cards | 0 | 0 | 
Indonesia  | Philippines  | 
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 Man of the Match:  Assistant referees: [40]   | 
| Statistics | Indonesia | Philippines | 
|---|---|---|
| Goals scored | 0 | 0 | 
| Total shots | 6 | 11 | 
| Shots on target | 0 | 3 | 
| Ball possession | 54% | 46% | 
| Corner kicks | 7 | 6 | 
| Fouls committed | 13 | 9 | 
| Offsides | 5 | 1 | 
| Yellow cards | 0 | 2 | 
| Red cards | 0 | 0 |