Composite material blade, rotating machine, and method for molding composite material blade

A composite blade which is formed by using a composite material containing reinforcing fibers and a resin, and has a positive pressure surface and a negative pressure surface, the composite blade comprising:

• a pressure-side part which is a part on a positive pressure surface side in a blade thickness direction, which is a direction joining the positive pressure surface and the negative pressure surface;
• a suction-side part which is a part on a negative pressure surface side in the blade thickness direction;
• and
• a metal shield portion provided on a leading edge side which is an upstream side in a circulation direction in which a fluid circulates, wherein
• the metal shield portion includes a main body portion provided on the leading edge side, and an embedded portion provided on a trailing edge side which is a downstream side of the main body portion in the circulation direction and provided between the pressure-side part and the suction-side part, and
• a plate thickness of the metal shield portion in the blade thickness direction decreases from the main body portion toward the embedded portion, wherein
• the main body portion has an outer surface part which is an outer surface side and an inner part which is a part on an inner side of the outer surface part, and
• in the metal shield portion, at least the outer surface part has a solid structure and at least the embedded portion has a lattice structure.