To provide an inner guide unit to ease the peculiar fold of a long film folded in a sheet form.

This inner guide unit includes an inner guide 61 to be stored in a long film LF and a guide support 70 for supporting the inner guide 61. The inner guide 61 includes a supported portion 62 supported by the guide support 70 and an estrangement portion 67 jointly provided on the supported portion 62 for estranging the cut end of the long film LF. The supported part 62 includes a pair of guide-side pressing rollers 65, 65 supported rotatively by base members 63, 63 with a part of their peripheral faces outwardly protruded from both side edges of the base members 63, 63. Each folded line part on both side edges of the long film LF is inserted between the guide-side pressing rollers 65, 65 to be pushed out by support side pressing rollers 81A, 81B structuring the guide support 70.