The invention relates to a method for manufacturing a sandwich panel where a non-metallic material (2,12) is positioned between two metallic layers (1,3; 11,13). At least one of the metal layers (1,3; 11,13) is shaped into a three dimensional layer (3,13), and the metal layers (1,3; 11,13) and the non-metallic layer (2,12) are joined to each other by means of a mechanical contact achieved between the metal layers (1,3; 11,13).