1,3-Bis(prop-2-ynyl)-1H-1,3-benzimidazol-2(3H)-one

In the title compound, C13H10N2O, the fused-ring system is essentially planar, the largest deviation from the mean plane being 0.015 (1) . The two propynyl groups are nearly perpendicular to the benzimidazole plane, making dihedral angles of 85 (3) and 80 (2) °, and point in opposite directions. There are two short intermolecular C—H...O contacts to the carbonyl O atom, one involving the acetylenic H atom and the other a H atom of the methylene group.