The invention relates to a cuboidal flexible inliner (28) made of a plastic film with an upper filling connection (44) and a lower withdrawal connection (42) for a pallet container (10) for mounting and transporting liquid or flowable contents, comprising a thin-walled rigid inner container (12) made of thermoplastic, a tube lattice frame (14) which tightly surrounds the plastic inner container (12) as a support casing and which is made of horizontal and vertical tubular rods (18, 20) that are welded together, and a rectangular base palette (16) on which the plastic inner container (12) lies and to which the tube lattice frame (14) is rigidly connected. The cuboidal plastic inner container (12) has a protective housing-shaped recess (26) which is oriented inwards into the plastic inner container (12) on the base side in the middle of the front wall for assembling a closable withdrawal fitting (24) in a protected recessed manner. The aim of the invention is to improve the use of inliners in pallet containers and in particular to prevent the formation of folds of the inliner in the interior of the rigid inner container in a highly reliable manner. According to the invention, this isachieved in that the cuboidal flexible inliner (28) has a wall depression (34) which is oriented inwards and is correspondingly adapted to the protective housing-shaped recess (26) of the rigid plastic inner container (12) in the lower withdrawal region and which has flexible withdrawal connections (42) molded thereon, said connections being designed for a completely precise contact with the innersurface of the recess (26) protruding into the interior of the rigid plastic inner container (12) in the shape of a protective housing.