A kit for introducing an intragastric implant. The kit comprises an intragastric implant for implanting in the stomach. The implant is expandable from a configuration for introduction into the stomach to a therapeutic configuration within the stomach. The kit further includes a cartridge for packaging said implant in the introduction configuration. The cartridge is provided with an opener member activatable by positive action enabling it to depart from a closed configuration. The cartridge includes locking means functionally connected to the opener member and capable on its own, without any external action on said locking means of holding the cartridge in the closed configuration. The intragastic implant may be used for treating obesity.