Cavity assembly, stacked shell plate and cooking device

The embodiment of the utility model provides a cavity assembly, a stacked shell plate and a cooking device, the cavity assembly is used for the cooking device, the cavity assembly comprises a plurality of shell plates which are detachably connected, a cooking cavity is defined by the multiple shell plates, at least one of the multiple shell plates is the stacked shell plate, and the stacked shell plate comprises a plate body, a guide part and a first connecting part. Guide parts are respectively arranged at two opposite ends of the plate body, and a guide space is formed between the two guide parts; a first connecting part is arranged at the end, away from the plate body, of each guiding part and used for being connected with an adjacent shell plate. When the stacked shell plates are in a stacked state, the plate body of the upper stacked shell plate is located in the guide space of the lower stacked shell plate. The multiple shell plates forming the cavity assembly can be disassembled into spare parts to be