| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | - | Resident Evil: Extinction | $1,507,442 | - | 208 | - | $7,247 | $1,507,442 | 1 | Mongkol Major | true | false |
| 2 | 1 | The Bedside Detective | $132,744 | -53% | 50 | -18 | $2,654 | $2,146,348 | 4 | GMM Tai Hub (GTH) | false | false |
| 3 | 3 | Ghost Mother | $67,699 | -63.7% | 61 | +6 | $1,109 | $318,578 | 2 | Pranakorn Films | false | false |
| 4 | 4 | Gigs: Case of Boøwy 2 | $59,223 | -53.9% | 47 | +4 | $1,260 | $240,001 | 2 | Mono Film | false | false |
| 5 | 2 | War | $53,660 | -74% | 45 | -25 | $1,192 | $330,304 | 2 | - | false | false |
| 6 | 5 | Shoot 'Em Up | $22,860 | -74.7% | 51 | +2 | $448 | $145,017 | 2 | Mongkol Major | false | false |
| 7 | 8 | 1408 | $11,384 | -75.2% | 22 | - | $517 | $221,278 | 3 | M Pictures | false | false |
| 8 | 9 | The Brave One | $9,066 | -76% | 14 | -46 | $647 | $211,877 | 3 | Warner Bros. | false | false |
| 9 | 7 | Bangkok Love Story | $8,606 | -83.8% | 17 | -35 | $506 | $309,832 | 3 | Mongkol Film Company | false | false |
| 10 | 10 | Vacancy | $7,350 | -58.1% | 7 | - | $1,050 | $74,688 | 3 | Sony Pictures Releasing | false | false |
| 11 | 6 | The House | $6,458 | -88.8% | 18 | -31 | $358 | $1,322,197 | 4 | RS Film & Distribution | false | false |
| 12 | - | Blood Brothers | $2,614 | - | 3 | - | $871 | $2,807 | 1 | N/A | true | false |
| 13 | 13 | Prodigy | $2,268 | -23.5% | 1 | - | $2,268 | $6,451 | 2 | M Pictures | false | false |
| 14 | 12 | I Now Pronounce You Chuck & Larry | $1,413 | -70.5% | 4 | -3 | $353 | $263,333 | 5 | United International Pictures | false | false |
| 15 | 11 | I Know Who Killed Me | $1,395 | -88.7% | 3 | -13 | $465 | $69,039 | 3 | Mongkol Major | false | false |
| 16 | 18 | Two Days in Paris | $1,141 | +11.9% | 1 | - | $1,141 | $16,387 | 5 | Mongkol Major | false | false |
| 17 | 14 | The Bourne Ultimatum | $818 | -66.2% | 1 | -2 | $818 | $1,530,687 | 8 | United International Pictures | false | false |
| 18 | 19 | Harry Potter and the Order of the Phoenix | $464 | -18.9% | 1 | - | $464 | $5,624,992 | 12 | Warner Bros. | false | false |
| 19 | 15 | It's a Boy Girl Thing | $155 | -93.4% | 1 | -4 | $155 | $3,820 | 2 | N/A | false | false |
