The effect of some insecticides on survival of the spider Parasteatoda tepidariorum Koch has been investigated under constant laboratory conditions 25±1°C and 70±5%RH. Mortality after 48h of treatment with LC₅₀ of Abtar^® 90%SP, Andros^® 7.5%WG and Grand^® 5%EC has been examined. The effectiveness of selected insecticides on the biological aspects such as longevity periods, prey consumption of adults and fecundity of females has been investigated. As well Andros^® showed to be the most effective due to its high acute toxicity, on biological aspects for both female and male and prey consumption.  In addition, the study revealed that Andros^® was also to be the most drastically effective on fecundity of females.