An excrement collection device includes a casing having a bottom wall, two opposing first outer sidewalls, and a second outer sidewall connecting the first outer sidewalls; a receiving space defined by the bottom wall, the first outer sidewalls, and the second outer sidewall and divided into a temporary storage region and a collection region, with the temporary storage region disposed between the second outer sidewall and the collection region; a cleansing component disposed in the temporary storage region; and a support component disposed at the top of the temporary storage region and having rotatable support boards. Excrement left behind at home by pets because of defecation and urination is gathered in the collection region to thereby spare pet keepers the hassles of frequent cleansing, prevent exposure of the excrement to air for a long period of time, and preclude a foul-smelling odor otherwise lingering at home.本案係揭露一種排泄物收集裝置,包含:一殼體,包括一底壁、兩相對的第一外側壁及連接該等第一外側壁的一第二外側壁;一容置空間,由該底壁、該等第一外側壁及該第二外側壁所界定,該容置空間被區分為一暫存區域與一收集區域,該暫存區域位於該第二外側壁與該收集區域之間;一清理構件,設置於該暫存區域內;以及一支撐構件,設置於該暫存區域之頂部,該支撐構件包括複數可旋轉支撐板。藉此,透過本發明實施例之排泄物收集裝置,寵物於家中便溺後所遺留下的排泄物可被集中至該收集區域,不需要飼主隨時清理,且排泄物亦不會長時間暴露於空氣中,造成家中的空氣瀰漫令人難受的惡臭。