A wind-turbine blade that prevents foreign matter from entering the inside thereof during transportation and that can be efficiently assembled in good condition is provided. A wind-turbine blade (9) includes a skin (14) that forms a long and hollow shape, and a main spar (16) that extends in the longitudinal direction and reinforces the skin (14) from the inside thereof. The main spar (16) is divided into a blade-root-side main spar (31) and a blade-tip-side main spar (33) in the longitudinal direction； the blade-root-side main spar (31) and the blade-tip-side main spar (33) have connection sections (50) that are connected to each other； the skin (14) is divided into a connection-section skin (25), located at a position corresponding to the connection sections (50), a blade-root-side skin (21), and a blade-tip-side skin (23)； and openings (43) formed in the blade-root-side skin (21) and the blade-tip-side skin (23) are blocked off by blanking plates (45).
