Effect of heat treatment on pore microstructure of La_0.8Sr_0.2CrO₃ compacts was investigated by small angle neutron scattering (SANS) over the scattering wave-vector range of 0.003–3.5nm⁻¹. Phase and composition of the powder synthesized by gel combustion method were characterized by X-ray diffraction. Agglomerate size distribution was measured by laser diffraction. Average agglomerate size (D₅₀)was found to be 950 nm. Analysis of SANS data showed that pores in the green compact follow power law distribution. Pores in sintered compacts follow log-normal size distribution. Though there was decrease in porosity of the compact with increasing sintering temperature, a shift in size distribution of pores towards higher side was observed. Scaling of SANS profiles of sintered compacts using Rg as characteristic length indicated that morphological pattern of the pores in the system look nearly similar at different temperatures.