A wind energy plant tower with a tower portion made of a concrete material and a steel-made tubular tower segment, which has on its foot a plurality of connection bores for the connection to the tower portion made of the concrete material, wherein the tower portion made of the concrete material has a head portion with a plurality of openings and a plurality of anchor bolts are provided, which can be fastened after the completion of the tower portion made of the concrete material each at a time in or on one of the connection bores on the foot of the steel-made tower segment and one of the openings in the head portion.