Inflatable curtain with anchor device

An apparatus (10) comprises an inflatable vehicle occupant protection device (14) inflatable in a first direction away from a vehicle roof (18) into a position between a side structure (16) of the vehicle (12) and a vehicle occupant. An elongated member (70) is connected to the side structure (16) and has a first end (72), an opposite second end (76) and a length measured between the first and second ends. An element (100) is connected to the protection device (14) and at least partially encircles the elongated member (70). The element (100) is slidable along the elongated member (70) in the first direction when the protection device (14) is inflated. The element (100) includes at least one portion (150, 212) that engages the elongated member (70) and blocks the element from sliding along the elongated member in a direction opposite the first direction.