Le Petit Bras (English: The Little Arm) is a tributary of the Amédée River, crossing the town of Baie-Comeau, in the Manicouagan Regional County Municipality, in the administrative region of the Côte-Nord, in the province of Quebec, in Canada.

[1] Besides the industrial area and the urban area at the end of the segment, forestry is the main economic activity in this valley.

[2] The surface of the Amédée River is usually frozen from the beginning of December to the end of March, except the rapids areas; however, traffic on the ice is generally safe from mid-December to mid-March.

The Petit Bras rises from a small lake (length: 0.3 km (0.19 mi); altitude: 187 m (614 ft)).

This lake is located at: Le Petit Bras flows on 11.8 km (7.3 mi) with a drop of 137 m (449 ft), according to the following segments: The Petit Bras flows on the northeast bank of the Amédée River, that is to say: The toponym "Le Petit Bras" was formalized on August 2, 1974, at the Place Names Bank of the Commission de toponymie du Québec.