The Rue Belliard (French) or Belliardstraat (Dutch) is a major street in the European Quarter of Brussels, Belgium, running parallel to the Rue de la Loi/Wetstraat.

Both are one-way streets; where traffic in the Rue de la Loi runs in the western direction towards Brussels' city centre, the Rue Belliard runs in the eastern direction, away from the city centre.

The section on one lane from one park to the other is partly in the territory of the municipality of Etterbeek.

The rest of the street is in the territory of the City of Brussels.

[1] The first part of the Rue Belliard (from the Avenue des Arts/Kunstlaan until the Rue van Maerlant/Van Maerlantstraat) was opened in 1855, while the second part of the street (until the Cinquantenaire) was finished in 1869.