Reduviidae (Hemiptera) is a family of polyphagous predators that can be used as biological control agents for one or more pest species. Predator efficiency of Pselliopus latispina over Tetranychus urticae Koch females was evaluated using the functional response at different mite densities. Mites were exposed to predation in Petri dishes under laboratory controlled conditions during 24 hours. Predators consumed an average of 56.3 individuals of 64 adult females of T. urticae, with a type II functional response according to Holling's instant discovery rate model (a') of 1.0597, and a handling time (th) of 0.00442. These results indicated that Pselliopus latispina is a predator with broad perspective that can be used in different crops.