After only two years in England, Elstrup moved back to Denmark to rejoin Odense. Odense only paid £200,000, despite having sold him to Luton only two years before for more than four times that amount, and having attained an impressive goalscoring record at the English club, as well as still being in his twenties. Sure enough, after selling Elstrup, Luton were relegated. He played two more seasons for Odense, scoring 24 goals, before retiring in strange circumstances. These strange circumstances were due to damage to body and mind, quote Lars Elstrup himself.