The 2003 British Open was the 2003 edition of the British Open professional ranking snooker tournament, that was held from 8–16 November 2003 at the Brighton Centre, Brighton, England.

Stephen Hendry won the tournament by defeating Ronnie O'Sullivan nine frames to six in the final.

The final saw a record 5 centuries in a row from the two players (three from O'Sullivan and two from Hendry, including a 135), which remains a joint record for consecutive centuries made between two players in a professional tournament match and is a standalone record for ranking events and finals.

The breakdown of prize money for this year is shown below:[1] Winner: £52,000 Runner-up: £26,000 Semi-final: £13,000 Quarter-final: £9,500 Last 16: £7,450 Last 32: £5,600 Last 48: £3,900 Last 64: £2,750 Last 80: £1,750 Last 96: £1,100 Stage one highest break: £1,800 Stage two highest break: £5,000 Stage one maximum break: £5,000 Stage two maximum break: £20,000 Total: £450,000

[2][3] Qualifying for the tournament took place at Pontins in Prestatyn, Wales between 21 and 25 September 2003.