Composite material bonding apparatus and composite material bonding method

A composite material bonding method comprising:

• a heating step of locating a sheet heater having a planar shape at an insertion position between a first bonding surface of a first composite member and a second bonding surface of a second composite member facing the first bonding surface, so as to be parallel to the first bonding surface and to the second bonding surface, and of causing the sheet heater to heat the first bonding surface and the second bonding surface;
• a retracting step of retracting the sheet heater to a retract position to be retracted from the insertion position;
• and
• a bonding step of causing the first bonding surface and the second bonding surface to approach each other, and of bonding the first bonding surface and the second bonding surface to each other, wherein
• the sheet heater includes a heat generating unit made of graphite and insulting layers that sandwich and fix the heat generating unit.