A composite material (10, 10A, 10B, 10C) comprising: a first porous metal body having a three-dimensional mesh-like skeleton; a second porous metal body having a three-dimensional mesh-like skeleton; and a bonding portion (2, 2aa, 2ac, 2ad, 2bc, 2bd) in which the skeletons of the first porous metal body and the second porous metal body are entangled with each other and, thereby, the first porous metal body is bonded to the second porous metal body, wherein: the first porous metal body and the second porous metal body are composed of a plurality of cells having a hole and a metal skeleton; one of the cells is expressed as a regular dodecahedron; the cell has a connection of the fiber portions, the fiber portion constituted of a fibrous or rod-like metal portion; the cell includes substantially pentagonal openings surrounded by the fiber portions; the adjacent cells are communicated with each other by sharing one opening; the fiber portions form a mesh-like network while demarcating a plurality of holes continued; the metal constituting the first porous metal body and the second porous metal body includes at least one of copper, a copper alloy, nickel, a nickel alloy, aluminium, an aluminium alloy, and a stainless steel; the porosity of the composite material (10, 10A, 10B, 10C) is 60 percent by volume or more and 99 percent by volume or less; the average hole size of the first porous metal body and the second porous metal body is 300 μm to 5000 μm; the pore size of the first porous metal body and the second porous metal body is 100 μm to 3000 μm; a first porous metal body having a three-dimensional mesh-like skeleton; a second porous metal body having a three-dimensional mesh-like skeleton; and a bonding portion (2, 2aa, 2ac, 2ad, 2bc, 2bd) in which the skeletons of the first porous metal body and the second porous metal body are entangled with each other and, thereby, the first porous metal body is bonded to the second porous metal body, wherein: the first porous metal body and the second porous metal body are composed of a plurality of cells having a hole and a metal skeleton; one of the cells is expressed as a regular dodecahedron; the cell has a connection of the fiber portions, the fiber portion constituted of a fibrous or rod-like metal portion; the cell includes substantially pentagonal openings surrounded by the fiber portions; the adjacent cells are communicated with each other by sharing one opening; the fiber portions form a mesh-like network while demarcating a plurality of holes continued; the metal constituting the first porous metal body and the second porous metal body includes at least one of copper, a copper alloy, nickel, a nickel alloy, aluminium, an aluminium alloy, and a stainless steel; the porosity of the composite material (10, 10A, 10B, 10C) is 60 percent by volume or more and 99 percent by volume or less; the average hole size of the first porous metal body and the second porous metal body is 300 μm to 5000 μm; the pore size of the first porous metal body and the second porous metal body is 100 μm to 3000 μm; the first porous metal body and the second porous metal body are composed of a plurality of cells having a hole and a metal skeleton; one of the cells is expressed as a regular dodecahedron; the cell has a connection of the fiber portions, the fiber portion constituted of a fibrous or rod-like metal portion; the cell includes substantially pentagonal openings surrounded by the fiber portions; the adjacent cells are communicated with each other by sharing one opening; the fiber portions form a mesh-like network while demarcating a plurality of holes continued; the metal constituting the first porous metal body and the second porous metal body includes at least one of copper, a copper alloy, nickel, a nickel alloy, aluminium, an aluminium alloy, and a stainless steel; the porosity of the composite material (10, 10A, 10B, 10C) is 60 percent by volume or more and 99 percent by volume or less; the average hole size of the first porous metal body and the second porous metal body is 300 μm to 5000 μm; the pore size of the first porous metal body and the second porous metal body is 100 μm to 3000 μm;