Abstract-Crystal structure of coumarin 6 has been solved by X-ray diffraction. The crystals are triclinic, space group P-1, with a=8.823(2) Å, b=8.898(2) Å, c=11.025(9) Å, α=86.41(3)°, β=85.39(3)°, γ=76.23(3)°, Mr=350.42, V=837.1(3) Å 3 , Z=2 and R=0.0516. The molecules are packed parallel to each other by weaker π···π and C-H···π interactions. The detailed geometry of C-H···π interactions were discussed. The hydrogen bonds and non-traditional C-H···O interactions join the no-parallel molecules together. All the molecules packed wall-like with the molecular brick.