A method for manufacturing a semiconductor device according to the present invention includes: (a) disposing, on a substrate (insulating substrate), a bonding material having a sheet shape and having sinterability; (b) disposing a semiconductor element on the bonding material after the (a); and (c) sintering the bonding material while applying pressure to the bonding material between the substrate and the semiconductor element. The bonding material includes particles of Ag or Cu, and the particles are coated with an organic film.