A combined table and portable solar water heater comprises a suitcase-like rigid casing (20) molded from a rigid plastic material which contains a pair of solar collector panels (38) and (38a) connected in series. The panels can be exposed to solar radiation when the casing is opened. Each collector panel (38) or (38a) is formed by a copper plate with the solar radiation absorbing surface and copper pipe coil (56) or (56a) in heat-transferring relationship with said copper plate. The casing is provided with compartments (40) and (40a) for accessories, such as adjustable legs (42a, 42b, etc.) for supporting the casing, adjusting its angle to incident sunlight, and for converting the casing into a table; containers for feeding cold water to the solar collector and for receiving hot water from the collector; and a tripod stand (86) for supporting the feeding container at the level above the collector and for arranging a shower set. Temperature-insulating layers (64, 64a) of the collectors are formed by separate pieces of rigid material which can be removed from the casing and assembled into a box-shaped container which can be utilized for maintaining water heated by means of the solar water heater at an elevated temperature.