| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | 1 | Resident Evil: Extinction | $501,405 | -66.7% | 125 | -83 | $4,011 | $2,427,099 | 2 | Mongkol Major | false | false |
| 2 | - | Body | $320,467 | - | 131 | - | $2,446 | $363,705 | 1 | GMM Tai Hub (GTH) | true | false |
| 3 | - | Stardust | $315,801 | - | 93 | - | $3,395 | $315,801 | 1 | United International Pictures | true | false |
| 4 | - | Underdog | $139,714 | - | 43 | - | $3,249 | $234,578 | 1 | Walt Disney Pictures | true | false |
| 5 | 2 | The Bedside Detective | $60,908 | -54.1% | 43 | -7 | $1,416 | $2,291,520 | 5 | GMM Tai Hub (GTH) | false | false |
| 6 | 5 | War | $11,016 | -79.5% | 28 | -17 | $393 | $370,918 | 3 | - | false | false |
| 7 | 4 | Gigs: Case of Boøwy 2 | $10,305 | -82.6% | 25 | -22 | $412 | $287,483 | 3 | Mono Film | false | false |
| 8 | 3 | Ghost Mother | $4,917 | -92.7% | 19 | -42 | $258 | $354,786 | 3 | Pranakorn Films | false | false |
| 9 | 6 | Shoot 'Em Up | $4,903 | -78.6% | 9 | -42 | $544 | $164,854 | 3 | Mongkol Major | false | false |
| 10 | 8 | The Brave One | $2,639 | -70.9% | 3 | -11 | $879 | $223,465 | 4 | Warner Bros. | false | false |
| 11 | 10 | Vacancy | $2,426 | -67% | 3 | -4 | $808 | $80,784 | 4 | Sony Pictures Releasing | false | false |
| 12 | 9 | Bangkok Love Story | $2,019 | -76.5% | 2 | -15 | $1,009 | $321,232 | 4 | Mongkol Film Company | false | false |
| 13 | 13 | Prodigy | $1,468 | -35.3% | 1 | - | $1,468 | $9,265 | 3 | M Pictures | false | false |
| 14 | 16 | Two Days in Paris | $1,317 | +15.4% | 1 | - | $1,317 | $18,684 | 6 | Mongkol Major | false | false |
| 15 | 18 | Harry Potter and the Order of the Phoenix | $1,203 | +159.3% | 1 | - | $1,203 | $5,713,857 | 13 | Warner Bros. | false | false |
| 16 | 7 | 1408 | $1,170 | -89.7% | 3 | -19 | $390 | $232,031 | 4 | M Pictures | false | false |
| 17 | 15 | I Know Who Killed Me | $1,058 | -24.2% | 1 | -2 | $1,058 | $72,195 | 4 | Mongkol Major | false | false |
| 18 | 11 | The House | $129 | -98% | 1 | -17 | $129 | $1,346,634 | 5 | RS Film & Distribution | false | false |
| 19 | 12 | Blood Brothers | $63 | -97.6% | 1 | -2 | $63 | $4,191 | 2 | N/A | false | false |
