A portable confinement apparatus having an enclosure for confining a person upon a mattress. The enclosure is formed of a flexible material having a base face, at least four side faces and a roof which define a void, with a pocket for the mattress. A frame has four base members arranged in a rectangle with two bridge members, arranged over the base members. At least part of each base member is integrally secured to the base section and at least part of each bridge member is integrally secured to the roof section. The enclosure is provided with at least two closable openings on different sides. An opening may extend into the roof section. Support struts and a stabilisation system are also described to increase stability and prevent tipping. Members may be telescopic to increase the portability of the apparatus.