Provided is an upwind wind turbine (1) equipped with a hub (40) disposed rotatably around a rotation axis line (R), a plurality of blades (6) that rotates with the hub (40), a tilting mechanism (4A) that connects the hub (40) with the blades (6) in such a manner that the blades (6) can be tilted with respect to a rotation plane around the rotation axis line (R), a drive device (4C) that drives the tilting mechanism (4A) so as to switch between an upright condition in which the blades (6) are caused to stand and a tilt condition in which the blades (6) are tilted, and a fixedly-supporting mechanism (4B) that is disposed independently of the tilting mechanism (4A) and the drive device (4C) and is switched between a lock condition in which tilting of the blades (6) from the upright condition is prevented and an unlock condition in which the blades (6) can be tilted into the tilt condition.