Experiments on the model of paired sensory contact demonstrated that stimulation of immune response in aggressive CBA and C57Bl/6J mice with 10- and 20-day experience of victories, respectively, was prevented by selective δ(2)- and -opioid receptor agonists DSLET and κ-opioid receptor agonists rimorphin in a dose of 100 microg/kg. In C57Bl/6J mice with depression-like behavior, normalization (but not suppression) of the immune response under conditions of μ-opioid receptor stimulation (100 microg/kg) was observed. Selective modulation of activity of a certain type of opioid receptors can normalize the immune function modified during the formation of a certain behavioral type.