Abstract: A collapsible void filling apparatus (10) with at least one multiple elongate hollow rectilinear member (14, 16, 74 80) arranged in side by side relationship to form a body (21) for insertion into a void (24) between stacks of cargo (12) in a freight vehicle to prevent shifting of the cargo with overlapping, reinforced, cross support walls (23, 30, 31), a locking member (50) insertable from the end of one of the hollow members to a locking position which prevents collapse of the void filler body (21) during handling while allowing a clear view through the hollow member and which also functions as a handle for use in inserting the void filling apparatus (10, 10', 10", 10'") into the void (24) and tab members (56, 58) for holding the locking member (50) in the locking position (FIG. 1).