The 4-pentylphenyl-4’-pentoxXthiobenzoate (<(5)over barS5>), C23H30O2S, crystallizes in the monoclinic system : space group P2(1)/c, a = 19.817 (2) Angstrom, b = 5.585 (1) Angstrom, c = 20.238 (2) Angstrom, beta = 104.792 (8)degrees, z = 4. The structure was solved by direct methods and refined to the final R = 0.065, for 3415 observed reflections. The pentoxythiobezoate moiety is nearly planer. Molecular rows form an interclated structure. C-H ... O type short intermolecular contacts were found.