Yes, Spiders Eat Spiders.

Do some spiders eat other spiders?

Spider cannibalism is the act of a spider consuming all or part of another individual of the same species as food. In the majority of cases a female spider kills and eats a male before, during, or after copulation. Cases in which males eat females are rare.

Do spiders kill spiders?

Cellar spiders sometimes leave their webs to hunt other spiders on their turf, mimicking prey to catch their cousins for dinner. Although they are generalist predators, apt to eat anything they can catch, spiders regularly capture nuisance pests and even disease-carrying insects – for example, mosquitoes.