Diethyl 2-{[3-(2-meth-oxy-benz-yl)thio-phen-2-yl]methyl-idene}malonate.

In the title compound, C(20)H(22)O(5)S, the dihedral angle between the mean planes through the thio-phene and benzene rings is 75.2 (1)°. The meth-oxy group is essentially coplanar with the benzene ring, the largest deviation from the mean plane being 0.