PROBLEM TO BE SOLVED: To provide a wind turbine with articulated blades whose conversion efficiency is improved.SOLUTION: The wind turbine 10A includes: inboard blades 12A, 12B, 12C; outboard blades 14A, 14B, 14C; a hub 16; a winch 18; a drive device 20; cables 22A, 22B, 22C; pulleys 24A, 24B, 24C; elbows 26A, 26B, 26C; and spring loaded hinges 28A, 28B, 28C. The outboard blades pivotably connected to the inboard blades are driven with respect ot the inboard blades by cables so that swept angles Ψ, Ψ, Ψare varied. Thus, the conversion efficiency for wind turbine is optimized in view of wind conditions, etc. In low wind conditions, the outboard blades achieve maximum conversion efficiency by extending the swept angles to a position up to 180° between blades. In higher wind conditions, the outboard blades drive the inboard blades up to 180° or less of the swept angles. Consequently, the wind turbine 10A is not required to be shut down even in higher wind conditions.