In the crystal structure of the title compound, C(15)H(16)O(2)S, the thio-phene ring is essentially planar (r.m.s. deviation = 0.006 Å for all non-H atoms) and roughly coplanar with the benzene ring, the dihedral angle between the mean planes of the rings being 4.35 (8)°. An intra-molecular O-H⋯O hydrogen bond is observed between the OH group and the aldehyde O atom.