A pet toilet device, especially suitable for cats, includes a toilet body, a resilient stopper and an excrement collection drawer. The toilet body has a channel and an accommodating space both arranged therein. The excrement collection drawer is provided in the accommodating space of the toilet body, positioned under the opening of the channel, and capable of being drawn out from the accommodating space. Hence, it allows cats to toilet by itself without cat litter. It is able to not only block the smell, but also save the spending of the cat owners from buying cat litter.
