This study investigated the high temperature compressive deformation (25℃~800℃) behavior of Ni-22.4%Fe-22%Cr-6%Al porous metal that is manufactured via powder process. Two different porous metals - 580㎛ (cell size) and 800㎛ - were used. The relative densities were 8.51% for the 580㎛ and 6.19% for the 800㎛ material. Those materials were to consist of γ-Ni, γ’-Ni₃Al and β-NiAl phases. The compression results, regardless of temperature, revealed typical three stages of deformation behavior (elastic, plateau, and densification region). At all temperatures, 580㎛(a higher density) showed higher strengths than those of 800㎛. However, the difference of strength continuously decreased with increasing temperature. Fractography revealed that the fine cracks easily propagated along interphase boundary in the strut regardless of deformation temperature and porosity condition. Based on these results, the mechanism of high temperature deformation of porous metal was also discussed.