The Asia/Oceania Zone was one of three zones of regional competition in the 2004 Davis Cup.
Group I edit
| Second Round Play-offs | First Round Play-offs | First Round | Second Round | |||||||||||||||
| Nonthaburi, Thailand (indoor hard) | ||||||||||||||||||
| S |  Thailand | 5 | ||||||||||||||||
| Kaohsiung, Taiwan (hard) |  Pakistan | 0 | Bangkok, Thailand (indoor hard) | |||||||||||||||
| Pakistan | 0 | S | Thailand | 4 | ||||||||||||||
 Chinese Taipei | 5 | Kaohsiung, Taiwan (hard) | S |  Uzbekistan | 1 | |||||||||||||
| S | Uzbekistan | 4 | ||||||||||||||||
| Islamabad, Pakistan (clay) | Chinese Taipei | 1 | ||||||||||||||||
| Pakistan | 3 | |||||||||||||||||
 New Zealand | 2 | Jakarta, Indonesia (hard) | ||||||||||||||||
 Indonesia | 2 | |||||||||||||||||
| Jakarta, Indonesia (hard) | S |  Japan | 3 | Osaka, Japan (hard) | ||||||||||||||
| Indonesia | 5 | S | Japan | 3 | ||||||||||||||
| New Zealand | 0 | Invercargill, NZ (indoor carpet) | S |  India | 2 | |||||||||||||
| New Zealand | 2 | |||||||||||||||||
| S | India | 3 | ||||||||||||||||
- New Zealand relegated to Group II in 2005.
- Thailand and Japan advance to World Group Play-off.
Group II edit
| Play-offs | First Round | Second Round | Third Round | |||||||||||||||
| Kuala Lumpur, Malaysia (indoor hard) | ||||||||||||||||||
| S |  South Korea | 5 | ||||||||||||||||
| Tehran, Iran (clay) |  Malaysia | 0 | Busan, South Korea (hard) | |||||||||||||||
| Malaysia | 1 | S | South Korea | 5 | ||||||||||||||
 Iran | 4 | Beirut, Lebanon (indoor carpet) | S |  Lebanon | 0 | |||||||||||||
| S | Lebanon | 3 | ||||||||||||||||
| Iran | 2 | Nanjing, China (hard) | ||||||||||||||||
| S | South Korea | 2 | ||||||||||||||||
| Manila, Philippines (indoor clay) | S |  China | 3 | |||||||||||||||
 Philippines | 1 | |||||||||||||||||
| Manila, Philippines (indoor clay) | S | China | 4 | Nanjing, China (indoor hard) | ||||||||||||||
| Philippines | 4 | S | China | 5 | ||||||||||||||
| S |  Hong Kong | 1 | Causeway Bay, Hong Kong (hard) |  Kuwait | 0 | |||||||||||||
| S | Hong Kong | 1 | ||||||||||||||||
| Kuwait | 3 | |||||||||||||||||
- Malaysia and Hong Kong relegated to Group III in 2005.
- China promoted to Group I in 2005.
Group III edit
Venue: Phu Tho Tennis Centre, Ho Chi Minh City, Vietnam (hard)
Date: 5–11 April
| Group A | KAZ | TJK | QAT | OMA | |
| 1 |  Kazakhstan (3–0)
|
3–0 | 3–0 | 3–0 | |
|---|---|---|---|---|---|
| 2 |  Tajikistan (2–1)
|
0–3 | 3–0 | 3–0 | |
| 3 |  Qatar (1–2)
|
0–3 | 0–3 | 3–0 | |
| 4 |  Oman (0–3)
|
0–3 | 0–3 | 0–3 |
| Group B | POC | VIE | BRN | SYR | |
| 1 |  Pacific Oceania (3–0)
|
2–1 | 3–0 | 3–0 | |
|---|---|---|---|---|---|
| 2 |  Vietnam (2–1)
|
1–2 | 2–1 | 3–0 | |
| 3 |  Bahrain (1–2)
|
0–3 | 1–2 | 2–1 | |
| 4 |  Syria (0–3)
|
0–3 | 0–3 | 1–2 |
(scores in italics carried over from Groups)
| 1st–4th Play-off | KAZ | POC | VIE | TJK | |
| 1 | Kazakhstan (3–0)
|
2–1 | 3–0 | 3–0 | |
|---|---|---|---|---|---|
| 2 | Pacific Oceania (2–1)
|
1–2 | 2–1 | 2–1 | |
| 3 | Vietnam (1–2)
|
0–3 | 1–2 | 2–0 | |
| 4 | Tajikistan (0–3)
|
0–3 | 1–2 | 0–2 |
| 5th–8th Play-off | BRN | QAT | OMA | SYR | |
| 1 | Bahrain (3–0)
|
2–1 | 3–0 | 2–1 | |
|---|---|---|---|---|---|
| 2 | Qatar (2–1)
|
1–2 | 3–0 | 3–0 | |
| 3 | Oman (1–2)
|
0–3 | 0–3 | 2–1 | |
| 4 | Syria (1–2)
|
1–2 | 0–3 | 1–2 |
- Kazakhstan and Pacific Oceania promoted to Group II in 2005.
- Oman and Syria relegated to Group IV in 2005.
Group IV edit
Venue: Al Hussein Sport City, Amman, Jordan (hard)
Date: 5–11 April
| Pool A | KSA | SIN | JOR | UAE | BRU | TKM | |
| 1 |  Saudi Arabia (4–1)
|
3–0 | 2–1 | 0–3 | 3–0 | 3–0 | |
|---|---|---|---|---|---|---|---|
| 2 |  Singapore (4–1)
|
0–3 | 2–1 | 2–1 | 3–0 | 3–0 | |
| 3 |  Jordan (3–2)
|
1–2 | 1–2 | 2–1 | 3–0 | 2–1 | |
| 4 |  United Arab Emirates (3–2)
|
3–0 | 1–2 | 1–2 | 3–0 | 2–1 | |
| 5 |  Brunei (1–4)
|
0–3 | 0–3 | 0–3 | 0–3 | 2–1 | |
| 6 |  Turkmenistan (0–5)
|
0–3 | 0–3 | 1–2 | 1–2 | 1–2 |
| Pool B | SRI | BAN | MYA | KGZ | IRQ | |
| 1 |  Sri Lanka (4–0)
|
3–0 | 2–1 | 3–0 | 3–0 | |
|---|---|---|---|---|---|---|
| 2 |  Bangladesh (3–1)
|
0–3 | 2–1 | 3–0 | 3–0 | |
| 3 |  Myanmar (1–3)
|
1–2 | 0–3 | 2–1 | 1–2 | |
| 4 |  Kyrgyzstan (1–3)
|
0–3 | 0–3 | 1–2 | 2–1 | |
| 5 |  Iraq (1–3)
|
0–3 | 0–3 | 2–1 | 1–2 |
- Saudi Arabia and Sri Lanka promoted to Group III in 2005.