This article refers to the use of sulphited eucalyptus extract (var. Sideroxylon) as retanning agent for chrome upper leather. Leather retanned with sulphited eucalyptus extract have been found to give improved break, and other properties similars to the leathers retanned with suliphited quebracho extract. Others factors have been examined, two retannings concentrations, two fatliquors agents at two levels, and two types of drying. It was used a factorial design 26 with 31 free degree.