The present invention provides an odor deterrent which consists of a hollow closed housing (A) having a cavity filled with a porous carrier (B) containing an odorous component (C), wherein - the housing (A) is made of a biodegradable waterproof polymeric material containing at least 30 wt. % of a component selected from starch ester, polyhydroxybutyrate having the weight average molar mass of at least 20 000 g/mol, polylactide having the weight average molar mass of at least 10 000 g/mol, polycaprolactone having the weight average molar mass of at least 30 000 g/mol, polyurethane obtained by reacting a polyester or polyether-ester polyol and an aliphatic diisocyanate, and mixtures thereof, and up to 70 wt. % of an inert inorganic filler or a cellulosic filler, and optionally a plastifier, - the carrier (B) of the odorous component is made of a porous polymeric material containing at least 70 wt. % of a component selected from starch, starch ester, cellulose, polyurethane obtained by reacting a polyester or polyether-ester polyol and an aliphatic diisocyanate, and mixtures thereof, and up to 30 wt. % of an inert inorganic filler or a cellulosic filler, and optionally a plastifier, and - the odorous component (C) is selected from the group consisting of monocarboxylic acids having 4 to 6 carbons in the chain, a mixture of monocarboxylic acids having 4 to 6 carbon atoms in the chain, esters of said monocarboxylic acids, anhydrides of said monocarboxylic acids.La présente invention concerne un dispositif de dissuasion olfactive, qui consiste en un boîtier fermé creux (A) comportant une cavité remplie d'un support poreux (B) contenant un constituant odorant (C), dans lequel – le boîtier (A) est constitué d'un matériau polymère biodégradable étanche à l'eau contenant au moins 30 % en poids d'un constituant choisi parmi l'ester d'amidon, un polyhydroxybutyrate ayant une masse moléculaire moyenne d'au moins 20 000 g/mol, un polylactide ayant une masse moléculaire moyenne en
