| Details | |
|---|---|
| Duration | 5 January 2004 – 12 December 2004 |
| Edition | 27th |
| Tournaments | 146 |
| Achievements (singles) | |
← 2003 2005 → | |
The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 2004 calendar comprised 146 tournaments, with prize money ranging from $25,000 to $150,000.[1][2]