A porous aluminum sintered material is provided. The porous aluminum sintered material includes aluminum substrates (11) sintered each other, wherein pillar-shaped protrusions (12) projecting toward an outside are formed on outer surfaces of the aluminum substrates (11), the porous aluminum sintered material has junctions (15) in which the aluminum substrates (11) are bonded each other through the pillar-shaped protrusions (12), the junctions (15) include Ti-A1 compound (16), and a eutectic alloy phase (17) including Al and Si is provided on surface layers of the junctions (15).