A method for producing a metal foam is provided. The present application can provide a method for producing a metal foam, which can form, in a very short time, a metal foam which includes uniformly formed pores and has desired porosity and excellent mechanical properties; and a metal foam manufactured by the method. In addition, the present application can provide a method capable of forming, in ashort time, a metal foam in the form of a film or sheet having a thin thickness while ensuring the aforementioned physical properties; and such a metal foam.