The purpose of the present invention is to obtain a cover member for pet toilet seats, whereby, even with a reduced overall height, pet urine deposited thereon flows easily down in the toilet seat direction. A base section (21) has on the upper surface thereof a sloped surface (26) that gradually slopes downwards from a first end (22) towards a second end (23). The sloped surface (26) has: a first sloped section (27) arranged on the first end (22) side of the base section (21)； and a second sloped section (28) that is positioned further on the second end (23) side than the first sloped section (27), slopes to an end edge (25) of the second end (23), and has a greater slope than the first sloped section (27). An end edge section (31) has a sloped surface (32) on the upper surface side thereof that gradually slopes downwards as same becomes further removed from the first end (22) of the base section (21).本發明之目的在獲得既可抑制整體的高度，且即使淋到寵物的尿的時候，也可容易朝如廁薄片的方向流落之寵物用如廁薄片的蓋構件。亦即，基體部(21)在上面具有隨著從第1端(22)往第2端(23)逐漸地下降的傾斜面(26)，傾斜面(26)，是作成具有：被配置在基體部(21)的第1端(22)側的第1傾斜部(27)；以及斜度比第1傾斜部(27)更大的第2傾斜部(28)之構造，且該第2傾斜部是比第1傾斜部(27)更位於第2端(23)側，並傾斜到第2端(23)的端緣(25)，端緣部(31)，是作成具有在上面側隨著從基體部(21)的第1端(22)遠離逐漸地下降的傾斜面(32)之構造。
