The　regioselective　synthesis　of　fluorinated　allenes　via　a　metal-free　1,4-fluoroamination　of　1,3-enynes　is　presented.　This　method　employs　commercially　available　N-fluorobenzenesulfonimide　serving　as　both　the　nitrogen　source　and　the　fluorine　source,　affording　access　to　various　tetrasubstituted　allenes　in　a　straightforward　and　atom-economic　pathway.　Preliminary　mechanistic　studies　and　theoretical　studies　revealed　that　this　reaction　might　undergo　an　intimate　ion-pair　mechanism.