The Obrecheuil is a small river of Belgium, right tributary of the Haine.

The spring is in the municipality of Le Rœulx.

The river flows through the village of Thieusies, Casteau and St-Denis, to end her trip in the village of Obourg where the river meets the river Haine.

Around the river is a fertile valley known as a centre for growing chicory, hops, and earlier in the 20th century tobacco.

This article related to a river in Belgium is a stub.