Disclosed is a cartridge for medical and hospital waste, which comprises: a tubular body (1) provided with a base (3) and which is folded flat along the centre of the base (3) and along folding lines (12) on the tubular body, forming a flat body that can be stored easily; and a grid (2) made of sheets of card, which is disposed folded inside the tubular body (1) and which, when the cartridge is unfolded, opens to occupy the entire inside surface of the cartridge, defining cavities for receiving the medical waste. The base (3) can be formed from stiff card.