Expansion dowel

An expansion dowel comprises an axially extending cylindrical expansion sleeve (2) having a setting direction (S) with a first end leading in the setting direction (S) and a trailing second end, said sleeve (2) having an expansion region (5) extending axially from the first end toward the second end with at least one of axially extending slots and grooves therein, said sleeve (2) having a central bore (4) therein tapering conically inwardly towards the first end at least in the expansion region (5), an expanding member (6) being located within said central bore (4) for expanding said expansion region (5), said expanding member (6) having a first end face leading in the setting direction and a trailing second end face (6a) and a second bore (10, 14) extending from the second end face toward the first end face, first means (11) in said central bore (4) in contact with said second end face (6a) for preventing axially displacement of said expanding member (6) opposite to the setting direction (S), said first means (11) having an axially extending opening and a radially outer circumferential surface enlargeable by an axially extending pin-shaped member (7) insertable into said opening, said pin-shaped member (7) having a leading end, a trailing end and an axially extending conical region spaced from the leading end thereof and being drivable in the setting direction (S) and having a leading end region extending from the leading end thereof and being arranged to engage in the second bore (10, 14) of said expanding member (6).