Loxosceles laeta is a spider of importance in Chile and produce hight morbilethality in humans. The majority of the patients with a spider bite go to primary attention and to the emergency room. It is very important to know the morphology of the spider in order to be prompt identify and make a correct management of the patients. We showed its morphology in a photography of scanning electronic microscopy that detach its most fundamental aspects, like its six eyes located in a triangular disposition