In the title compound, C(19)H(18)O(6), also known as 3,4',5,7-tetra-methoxy-flavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23 (8)°. An intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (01) by inter-molecular C-H⋯O hydrogen bonds, which generate R(4) (4)(20), R(4) (4)(12) and R(2) (2)(14) ring motifs. Adjacent networks interact by π-π inter-actions between the pyran ring and its methoxy-phenyl substituent [centroid-centroid distance = 3.5267 (8) Å].