| Competition: | Iran Pro League |
| Season: | 2004–05 |
| Winners: | Foolad 1st Pro League title 1st Iranian title |
| Relegated: | Paykan Pegah |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Foolad Saba Battery (Hazfi Cup champions) |
| League Topscorer: | Reza Enayati (20 goals) |
| Matches: | 240 |
| Total Goals: | 545 |
| Biggest Home Win: | Est. Ahvaz 6–0 Shamoushak (31 December 2004) Persepolis 6–0 Pegah (24 April 2005) |
| Biggest Away Win: | Sepahan 1–4 Saipa (14 September 2004) Bargh Shiraz 0–3 Esteghlal (26 November 2004) Esteghlal 0–3 Zob Ahan (11 March 2005) Shamoushak 0–3 Est. Ahvaz (20 June 2005) |
| Highest Scoring: | Saba Battery 4–4 Bargh Shiraz (4 March 2006) |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
The 2004–05 Iran Pro League was the 22nd season of Iran's Football League and fourth as Iran Pro League since its establishment in 2001. PAS Tehran were the defending champions. The season featured 14 teams from the 2003–04 Iran Pro League and two new teams promoted from the 2003–04 Azadegan League. The two teams were the last seasons league champions Saba Battery and runners-up Malavan. The league started on 13 September 2004 and ended on 20 June 2005. Foolad won the Pro League title for the first time in their history (total first Iranian title).