Abstract: A portable steam sauna that provides a framing structure having a plurality of detachable framing members and coupling members wherein each coupling member releasably engages at least two framing members for manually assembling and disassembling the framing structure while utilizing a flexible, light-weight, soft, steamproof enclosure material for forming a steamproof enclosure. The framing structure utilizes light-weight, non-metallic, rigid framing members and coupling members having hollow cylindrical structures. The framing members and coupling members are preferably fabricated from a conventional polyvinyl chloride which will remain comfortable to a user's touch even in elevated temperatures. The releasable engagement between the coupling members and the framing members is a frictional fit to assure the framing structure remains assembled when said steam sauna is in use while also allowing for the manual disassembly and reassembly of the framing structure when the portable steam sauna is not in use.