PROBLEM TO BE SOLVED: To provide a method for cutting a metallic porous body having a three-dimensional network structure, with which occurrence of skeleton breakage of the metallic porous body at a cutting plane is reduced and with which the metallic porous body can be cut with high dimensional accuracy.SOLUTION: There is provided a method for cutting a metallic porous body, with which a metallic porous body having a three-dimensional network structure is irradiated with a laser beam at an irradiation density of 1×10W/mto 1×10W/m, and is cut.