PROBLEM TO BE SOLVED: To provide a pet excrement treatment material and a pet excrement treatment system which can effectively deodorize the odor of pet excrement and have high shape retention. SOLUTION: A pet excrement treatment material 20 contains 70.0% by mass or more and 98.9% by mass or less of a crushed product of a plant-derived material, and 1.0% by mass or more and 29.9% by mass or less of a synthetic resin. It contains 0.1% by mass or more and 5.0% by mass or less of a water-insoluble inorganic substance. The water-insoluble inorganic substance has an average particle size of 0.01 μm or more and 1 μm or less, a BET specific surface area of 3 m2 / g or more and 100 m2 / g or less, and a ratio of the BET specific surface area to the average particle size of 5 × 106 m / g. That is all. In the pet excrement treatment system 10, a perforated member 30 for laying the pet excrement treatment material is arranged on an absorber 40 for absorbing urine, and the perforated member 30 is placed on the perforated member. Pet excrement treatment material is laid. [Selection diagram] Fig. 1【課題】ペットの排泄物の臭いを効果的に消臭できるとともに、保形性が高いペット用排泄物処理材及びペット用排泄物処理システムを提供する。【解決手段】ペット用排泄物処理材20は、植物由来の素材の粉砕物を70.0質量%以上98.9質量%以下含み、合成樹脂を1.0質量%以上29.9質量%以下含み、非水溶性無機物を0.1質量%以上5.0質量%以下含む。非水溶性無機物は、平均粒子径が0.01μm以上1μm以下であり、BET比表面積が3m2/g以上100m2/g以下であり、且つ平均粒子径に対するBET比表面積の比が5×106m/g以上である。ペット用排泄物処理システム10は、尿を吸収するための吸収体40の上に、前記ペット用排泄物処理材を敷設するための多孔部材30が配されており、該多孔部材の上に前記ペット用排泄物処理材が敷設されている。【選択図】図1