PROBLEM TO BE SOLVED: To provide a device which can form foil envelopes of various lengths and types by high working ratio. SOLUTION: The device for forming sleeve-like foil envelopes from a continuous flat strip of a sleeve-like foil material comprises a supply member for supplying the continuous flat strip of sleeve-like foil material and a cutting member for making a cut in the strip of sleeve-like foil material over the full width so as to provide the individual sleeve-like foil envelopes, wherein the cutting member comprises at least two cutting elements that are movable relative to the flat strip of sleeve-like foil material, each cutting element comprising at least one cutting blade extending in parallel to at least part of the width of the strip, in such a manner that the individual cutting blades of the cutting elements form several partial cuts contiguous to each other in the strip of sleeve-like foil material over the entire width in successive cutting operations. COPYRIGHT: (C)2008,JPO&INPIT