An assembly for loading a self-expanding prosthetic device into a delivery device includes a compression member (202), a support member (204) and a constricting member (300). The compression member has a tapered wall between its first open end and its second open end, the tapered wall defining an open space adapted to receive the valve. The support member has a base (220) and a recess adapted to receive an end of the prosthetic device. The support member and the compression member are movable toward one another to compress the valve and push it through a relatively small aperture in the second open end of the compression member. The second end of the constricting member is sized to receive the compressed valve from the second open end of the compression member for loading into a delivery device.
