Abstract: A method for manufacturing a composite material includes the processes of: arranging a surface material in a chamber box; dividing the chamber box into a first space including the surface material arranged therein and a second space including a core member arranged therein by closing a dividing unit; heating the surface material; arranging the core member in the second space while the surface material is being heated; depressurizing the first space and the second space; opening the dividing unit to make the first space communicate with the second space, arranging the core member and the surface material relatively close to each other, and covering a predetermined part of the core member with the surface material; and pressurizing the chamber box to bond the surface material to the predetermined part of the core member so that the surface material fits the predetermined part of the core member.