| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | - | Boon Chu I Love Sara U | $484,010 | - | 102 | - | $4,745 | $484,010 | 1 | Five Star Entertainment | true | false |
| 2 | 1 | The Coffin 2008 Re-release | $191,963 | -58% | 60 | -37 | $3,199 | $780,507 | 2 | N/A | false | false |
| 3 | 2 | Death Race | $167,874 | -50.1% | 69 | -25 | $2,432 | $606,084 | 2 | United International Pictures | false | false |
| 4 | - | Made of Honor | $119,662 | - | 34 | - | $3,519 | $158,851 | 1 | Sony Pictures Releasing | true | false |
| 5 | - | Mamma Mia! | $93,478 | - | 29 | - | $3,223 | $93,478 | 1 | United International Pictures | true | false |
| 6 | - | Boys Over Flowers: Final | $82,287 | - | 32 | - | $2,571 | $82,287 | 1 | M Pictures | true | false |
| 7 | 3 | WALL·E | $71,504 | -60% | 55 | -25 | $1,300 | $1,185,865 | 3 | Walt Disney Pictures | false | false |
| 8 | - | The Deaths of Ian Stone | $47,709 | - | 28 | - | $1,703 | $47,709 | 1 | Mongkol Major | true | false |
| 9 | 4 | Where the Miracle Happens | $14,309 | -81.5% | 42 | -13 | $340 | $817,599 | 4 | GMM Tai Hub (GTH) | false | false |
| 10 | 5 | The Mummy: Tomb of the Dragon Emperor | $13,994 | -74.6% | 30 | -43 | $466 | $3,641,144 | 5 | United International Pictures | false | false |
| 11 | 8 | The Dark Knight | $12,933 | -33.3% | 5 | -6 | $2,586 | $2,633,831 | 7 | Warner Bros. | false | false |
| 12 | 9 | Journey to the Center of the Earth | $7,109 | -53.5% | 5 | -2 | $1,421 | $1,151,406 | 6 | Mongkol Major | false | false |
| 13 | 7 | Virgin Territory | $3,889 | -80.6% | 8 | -11 | $486 | $122,256 | 3 | Mongkol Major | false | false |
| 14 | 12 | Evangelion: 1.0 You Are (Not) Alone | $1,705 | -60.4% | 1 | - | $1,705 | $7,208 | 2 | N/A | false | false |
| 15 | 10 | Rogue | $576 | -95.6% | 5 | -33 | $115 | $164,297 | 3 | N/A | false | false |
| 16 | 14 | Reservation Road | $441 | -58.7% | 1 | - | $441 | $2,094 | 2 | J-Bics | false | false |
| 17 | 11 | A Kha Phu Na Rak | $414 | -96.5% | 9 | -25 | $46 | $15,559 | 2 | Mongkol Film Company | false | false |
| 18 | 13 | Sand Clock | $268 | -79.6% | 1 | - | $268 | $5,548 | 3 | Mongkol Major | false | false |
| 19 | 15 | A Tale of Mari and Three Puppies | $263 | -73.6% | 1 | -2 | $263 | $22,300 | 4 | M Pictures | false | false |
