The present investigation has been undertaken to evaluate gamma radiation shielding effectiveness of inorganic metal halide cubic perovskites CsBX3 (B = Sn, Ge, Pb; X = I, Br, Cl). The values of mass attenuation coefficients (mu/rho) were computed at the energy range of 1.00 keV-100 GeV by WinXCom computer code. Thereupon, half value layer (HVL), the effective atomic number (Z(eff)) and electron density (N-el) are calculated by using mu/rho values. Besides, energy absorption buildup factor (EABF) and exposure buildup factor (EBF) of inorganic metal halide cubic perovskites have been determined using the Geometric Progression (G-P) fitting method at energies 0.015-15 MeV up to penetration depths of 40 mean free path (mfp). The examined shielding parameters are highest in low energy region and lowest in the middle energy region. The results were discussed in relation to the contents of the samples. The lead-containing compounds are more efficient than the other compounds for shielding gamma radiations. Other perovskites (without lead) also have the ability to absorb radiation better than many other shielding materials currently used. Thus, the studied compounds may be effective in the production of novel shielding materials.