The title compound, C18H18S4, which lies on an inversion center, adopts a trans-gauche (+)-trans-gauche (-)-trans (tg (+) tg (-) t) conformation of the S-CH2-CH2-CH2-CH2-S bond sequence. In the crystal, a π-π inter-action with a centroid-centroid distance of 3.8797 (16) Å is observed.