Predaceous phytoseiid mites are important biological control agents of pest mites of many crops in different parts of the world .Neoseiulus californicus McGregor) Acari: Phytoseiidae) is a generalist predatory mite with high potential for controlling phytophagous mites and insects in greenhouse crops. The long-term establishment with enhanceing the performance of this predatory mite depends on offering a supplementary food in time of the main prey scarcity .Therefore, it seems that pollen grains are appropriate diets for them that can be used as alternative and/or supplementary food sources in lack of natural prey during the cropping period. The main purpose of this study is to evaluate effects of two pollen (pistachio, apricot) as supplementary food on the life table parameters of N. californicus on two-spotted spider mite (TSSM). All experiments were carried under laboratory conditions, at 25 ± 2 ˚C, 70 ± 5 % RH and a photoperiod of 16:8 (L:D) hours on bean (Phaseolus vulgaris L.) leaf discs. The data were analyzed based on the theory of age-stage, two-sex life table. Based on the results, the total life span of the predatory mite rearing on the diets offered varied from 27.71 to 32.36 days. The intrinsic rate of increase (r) on TSSM in the presence of the pistachio pollen (0.182 day-1) was significantly higher than those on TSSM in presence of the apricot pollen. The maximum value of the net reproductive rate (R0) (28.32 offspring/individual) was related when T. urticae served with pistachio pollen as diet. Rearing this predatory mite on TSSM in the presence of the pistachio pollen caused the highest rate of the finite rate of increase (λ) (1.19 day-1). In conclusion, the effectiveness of N. californicus on TSSM in the presence of the pistachio pollen was better than another diet.