South Korean Box Office For May 2009
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Terminator Salvation | $23,353,191 | 793 | $7,537,453 | 32.3% | 793 | May 21 | - | Lotte Entertainment |
| 2 | Mother | $16,283,879 | 764 | $5,334,959 | 32.8% | 764 | May 28 | - | CJ Entertainment |
| 3 | Angels & Demons | $9,887,278 | 618 | $3,614,183 | 36.6% | 618 | May 14 | - | Sony Pictures Releasing |
| 4 | Star Trek | $5,686,001 | 502 | $2,065,925 | 36.3% | 502 | May 7 | - | United International Pictures |
| 5 | Castaway on the Moon | $3,718,480 | 350 | $1,455,395 | 39.1% | 350 | May 14 | - | Cinema Service |
| 6 | The Echo | $225,751 | 174 | $127,750 | 56.6% | 174 | May 28 | - | - |
| 7 | Like You Know It All | $208,867 | 36 | $423 | 0.2% | 1 | May 1 | - | - |
| 8 | Ong Bak 2 | $154,275 | 230 | $100,682 | 65.3% | 230 | May 14 | - | KD Media |
| 9 | Halloween | $114,691 | 79 | $47,800 | 41.7% | 79 | May 14 | - | - |
| 10 | Cyborg She | $106,124 | 135 | $62,428 | 58.8% | 135 | May 14 | - | Next Entertainment World (NEW) |
| 11 | Chocolate Underground | $85,691 | 46 | $12,913 | 15.1% | 43 | May 1 | - | - |
| 12 | Boat | $69,314 | 58 | $31,298 | 45.2% | 58 | May 28 | - | Showbox Entertainment |
| 13 | Paris | $42,066 | 17 | $15,598 | 37.1% | 17 | May 7 | - | - |
| 14 | Detroit Metal City | $40,411 | 12 | $13,064 | 32.3% | 12 | May 21 | - | - |
| 15 | Wild Exploration Alive | $39,287 | 2 | $916 | 2.3% | 1 | May 14 | - | - |
| 16 | Before the Devil Knows You're Dead | $31,706 | 2 | - | - | - | May 14 | - | - |
| 17 | Boy A | $23,923 | 1 | - | - | - | May 1 | - | - |
| 18 | One Step More to the Sea | $12,704 | 6 | $3,290 | 25.9% | 6 | May 21 | - | - |
| 19 | Hong Sang Soo Film Festival: A Tale of the Cinema Film Festival | $5,695 | 1 | $1,812 | 31.8% | 1 | May 14 | - | - |
| 20 | Modern French Comedies | $5,567 | 1 | $2,030 | 36.5% | 1 | May 19 | - | - |
| 21 | Cloud 9 | $5,363 | 1 | $874 | 16.3% | 1 | May 28 | - | - |
| 22 | Where Is the Friend's House? | $4,546 | 1 | $846 | 18.6% | 1 | May 5 | - | - |
| 23 | Visitor Q 2009 Re-release | $3,281 | 1 | $2,468 | 75.2% | 1 | May 28 | - | - |
| 24 | Indie Forum 2009 | $3,226 | 3 | $1,652 | 51.2% | 3 | May 28 | - | - |
| 25 | Bertrand beulrie Bert | $2,029 | 1 | - | - | - | May 5 | - | - |
| 26 | Traveling with Yoshitomo Nara 2009 Re-release | $1,405 | 1 | - | - | - | May 4 | - | - |
| 27 | Pororo the Little Penguin | $1,204 | 1 | $265 | 22% | 1 | May 1 | - | - |
| 28 | France Movies Eccentricity | $1,143 | 1 | - | - | - | May 28 | - | - |
| 29 | The Little Penguin Pororo Special Exhibition 2 | $1,139 | 1 | $201 | 17.6% | 1 | May 1 | - | - |
| 30 | Silver Film Exhibition: Her Youth | $951 | 1 | $248 | 26.1% | 1 | May 14 | - | - |
| 31 | The Little Penguin Pororo Special Exhibition 3 | $847 | 1 | $702 | 82.9% | 1 | May 12 | - | - |
| 32 | Way | $439 | 3 | $414 | 94.3% | 3 | May 14 | - | - |
| 33 | Rediscovering Film History | $192 | 1 | $192 | 100% | 1 | May 1 | - | - |
This chart only reflects 98 percent of total screens in South Korea.
