The 2003 Scottish Open (officially the 2003 Regal Scottish Open) was a professional ranking snooker tournament that took place between 5–13 April 2003 at the Royal Highland Centre in Edinburgh, Scotland.

It was the seventh and penultimate ranking event of the 2002/2003 season.

David Gray won his first ranking title by defeating Mark Selby 9–7 in the final.

The defending champion, Stephen Lee, was defeated in the quarter-finals by John Higgins.

This was the final tournament held under the Scottish Open name, being re-branded the following season as the Players Championship before being discontinued.