A shoes having a pad within in the shoes, a piezoelectric device is provided in the shoes and a heating device is coupled to the piezoelectric device for generating heat to defend against the cold.一種保暖鞋包含鞋墊配置於鞋內,其中包含壓電元件,配置於鞋內,加熱元件耦接壓電元件,用以產生熱以供禦寒。2‧‧‧鞋體4‧‧‧鞋底6‧‧‧後跟8‧‧‧鞋墊10‧‧‧壓電元件12‧‧‧發熱元件