Deployable structure including: - a support structure, - a segmented structure including N sets of n adjacent elementary panels articulated together in pairs, N being an integer greater than or equal to 3, and n an even, non-zero positive integer, the N sets being connected in pairs by a connection panel, the segmented structure being configured to switch, during a deployment phase: o from a stored configuration wherein, for each set, the elementary panels are folded against each other, o to a deployed configuration, wherein the intermediate panels of each set and the connection panels are disposed in the same plane, called the deployment plane, said segmented structure having, in the deployed configuration, a hollow regular polygonal shape, characterised in that, in the stored configuration, said folded elementary panels of each set delimit a central cavity, and in that the deployable structure includes - a deployment device including at least one articulated arm, said at least one articulated arm including a plurality of successive elements articulated together in pairs, a first end of said at least one articulated arm being connected to the support structure and a second end of said at least one articulated arm being connected to one of said sets, the at least one articulated arm being configured to switch from the stored configuration wherein the elements of said at least one articulated arm are folded, to the deployed configuration wherein the at least one articulated arm is deployed, the at least one articulated arm, in the stored configuration, being disposed in the central cavity. - a support structure, - a segmented structure including N sets of n adjacent elementary panels articulated together in pairs, N being an integer greater than or equal to 3, and n an even, non-zero positive integer, the N sets being connected in pairs by a connection panel, the segmented structure being configured to switch, during a deployment phase: o from a stored configuration wherein, for each set, the elementary panels are folded against each other, o to a deployed configuration, wherein the intermediate panels of each set and the connection panels are disposed in the same plane, called the deployment plane, said segmented structure having, in the deployed configuration, a hollow regular polygonal shape, characterised in that, in the stored configuration, said folded elementary panels of each set delimit a central cavity, and in that the deployable structure includes o from a stored configuration wherein, for each set, the elementary panels are folded against each other, o to a deployed configuration, wherein the intermediate panels of each set and the connection panels are disposed in the same plane, called the deployment plane, said segmented structure having, in the deployed configuration, a hollow regular polygonal shape, - a deployment device including at least one articulated arm, said at least one articulated arm including a plurality of successive elements articulated together in pairs, a first end of said at least one articulated arm being connected to the support structure and a second end of said at least one articulated arm being connected to one of said sets,