The European route E 403 is a European route connecting the Belgian towns of Zeebrugge and Tournai. This north-south route runs entirely on Belgian territory and falls together with the Belgian roads N31 and A17.

E403
E-roads in Belgium with E403 in bright green
Major junctions
North end	Zeebrugge (Belgium)
South end	Tournai (Belgium)
Location
Countries	Belgium
Highway system
International E-road network A Class B Class

European route E 403 passes through the following towns and cities:

Zeebrugge - Bruges - Torhout - Roeselare - Kortrijk - Tournai

Near Bruges there's a connection with the E 40 and near Kortrijk with the E 17.