Tomato leafminer, ( Tuta absoluta ) is a serious pest of tomato that destroys large quantities of tomato in greenhouse and field cultivation. Biological control of this pest by using entomo- pathogen fungi such as Beauveria bassiana and parasitoid wa such as Habrobracon hebetor is possible. The present study aimed to evaluate the effect of B. bassiana fungi on different life stages of tomato leaf miner and larval parasitism rates by parasitoid wasp, H. hebetor , in laboratory condition. The possibility of the simultaneous use entomopathogen and parasitoid for control pest of tomato was also studied by determining the effects of fungal infected host on fertility life table parameters and parasitism rate of wasp. The efficacy of B. bassiana on different life stages of tomato leafminer in ten treatments (control and nine concentrations of B. bassiana conidium) and three replicate was evaluated. Results showed that egg and then pupae stages compared to larval stages are more sensitive to entomopathogen fungi, and the early larval stages are more sensitive than late larval stages. larval and pupal period of tomato leaf miner decreased by increasing concentrations of fungal conidium. The mortality rate of different stages of pest depends on the concentration of fungal conidium, so that mortality increased by increasing concentration. The results show that parasitism by H. hebetor was very low. Host preference of wasp on Ephestia kuehniella larvae against T. absoluta larvae, while wasp simultaneously had the same size of the both host, can be due to poor quality larvae of this pest to wasp parasitoid. Determination of the B. bassiana effects on fertility- life table parameters and parasitism rate of H. hebetor , conducted with 12 treatments in five replications. Infecting larvae of E. kuehniella with concentrations of zero, 10 3 , 10 6 and 10 9 conidium per ml -1 in three different periods of 24, 48 and 72 hours after inoculation were exposed to the parasitoid wasp. Egg developmental period of wasp showed no significant difference in treatments. Larval and pupal development period were significantly increased by increasing the concentration of fungal conidia and increasing the time after inoculation. Adult longevity of H. hebetor in controls in three periods of 24, 48 and 72 hours after inoculation, were significantly decreased by using fungus. Results also showed that the intrinsic rate of increase (r m ) and finite rate of increase (?) of parasitoid decreased by increasing of fungal conidia concentration. While the mean generation time (T) at different times after inoculation increased with increasing concentration. The net reproductive rate (R 0 ) just in 72 hours after inoculation showed significant difference between treatments. The results of this study showed that use of B. bassiana fungi in the biological control of tomato leafminer can be effective method. The infestation of host larvae by fungi has adverse effects on biological parameters of parasitoid wasp and can be reduced efficiency of H. hebetor in tomato pest management. Based on results combined application of H . hebetor and B . bassiana against tomato pests is not recommended. Keywords: Tomato, Biological control, Life table, Larval parasitoid