klep·to·ma·ni·a 
(klĕp′tə-mānē-ə, -mānyə)
(klĕp′tə-mānē-ə, -mānyə)n.
A psychiatric disorder characterized by an irresistible impulse to steal things even though there is no personal or financial need for them.
[Greek kleptein, to steal + -MANIA.]
klep′to·mani·ac′ (-nē-ăk′) n.
klep′to·ma·nia·cal (-mə-nīĭ-kəl) adj.