Foldaway balcony (10) comprising a vertical support (11), a platform structure (12) tiltably mounted to the vertical support (11) and a barrier structure (14) mounted on the platform structure (12). The platform structure comprises a support structure (16) and a floor structure (18) which are tiltable separately from one another relative to the vertical support (11). The barrier structure comprises barrier elements (14a, 14a'), hinged at the edge of the platform structure (12), and tiltable between a stowed position in which they lie inside the support structure (16), and a deployed position, in which they stand up relative to the support structure (16). A barrier element (14a'), connected to a distal side (ED) of the edge of the platform structure (12) comprises a first and a second pair of stanchions (14b', 14b") hinged to the distal side (ED), a first and a second rod (14d', 14d") which interconnect the upper ends of the stanchions (14b', 14b"), and a handrail (14c') with parallel guides, in which are housed the first and the second rods (14d', 14d").