A retractable awning comprises an awning fabric (2) which can be driven between an extended position and a folded position, at least one pair of lateral guides (4) elongated in the direction (Z) in which the fabric is driven and designed to slidably guide a plurality of sections (5), spaced apart from each other and fixed to the fabric (2), the sections (5) extending transversely to the guides. The fabric (2) comprises a plurality of fabric portions (2a), structurally independent of each other, positioned adjacent to each other in the direction of driving (Z), each fabric portion (2a) extending between each corresponding pair of adjacent sections (5), and sealing means are interposed between adjacent fabric portions (2a), these means extending transversely to the fabric (2) with respect to the direction (Z) in which the fabric is driven, so as to provide a sealing action on the awning across the whole fabric (2) surface formed by these portions (2a).