Disclosed are a device for loading a flexible intraocular lens into an injection cartridge capable of serving as a packaging support, an injection cartridge and a set formed by said loading device and an injection cartridge. The loading device comprises a tubular element (1) having an internal passage (10), said passage comprising a receiving section (11), an intermediate truncated folding section (12) and an end section (13) capable of receiving an injection cartridge detachably, a supporting element (3) mounted in said receiving section, capable of supporting a lens in a non-folded state, and a plunger (5) capable of pushing a lens (9) positioned in the receiving section through the truncated intermediate folding section to fold said lens gradually, then in the receiving chamber of an injection cartridge placed in the end section.
