Device for adjusting the position of structural elements of a structure of an aircraft, comprising: - a tool for measuring by photogrammetry that is configured to measure actual positions of the structural elements comprising: ∘ at least one pair of imaging devices (20.1, 20.2) that are configured to capture an image of the structural elements; ∘ a system for analysing the images taken by the at least one pair of imaging devices (20.1, 20.2) that is configured to determine, from the images captured by the imaging devices (20.1, 20.2), a value for the actual position of each structural element; - a processing and calculation system that is configured to compare each value of the actual position determined by the analysis system with a corresponding theoretical value, and to determine therefrom an adjustment value; - an adjustment tool that is configured to be attached in use to the structure, comprising: ∘ at least one support, ∘ at least one measurement sensor that is attached to the support and is configured to measure a variation in a distance between said measurement sensor and the structural element, ∘ a removable connection system that is configured to connect said support to the structure in such a way that said measurement sensor points toward the structural element, and ∘ a calculator that is configured to compare the value measured by the measurement sensor with the corresponding adjustment value, and to derive therefrom corrective actions to finalize adjustment of the structural element. - a tool for measuring by photogrammetry that is configured to measure actual positions of the structural elements comprising: ∘ at least one pair of imaging devices (20.1, 20.2) that are configured to capture an image of the structural elements; ∘ a system for analysing the images taken by the at least one pair of imaging devices (20.1, 20.2) that is configured to determine, from the images captured by the imaging devices (20.1, 20.2), a value for the actual position of each structural element; ∘ at least one pair of imaging devices (20.1, 20.2) that are configured to capture an image of the structural elements; ∘ a system for analysing the images taken by the at least one pair of imaging devices (20.1, 20.2) that is configured to determine, from the images captured by the imaging devices (20.1, 20.2), a value for the actual position of each structural element; - a processing and calculation system that is configured to compare each value of the actual position determined by the analysis system with a corresponding theoretical value, and to determine therefrom an adjustment value; - an adjustment tool that is configured to be attached in use to the structure, comprising: ∘ at least one support, ∘ at least one measurement sensor that is attached to the support and is configured to measure a variation in a distance between said measurement sensor and the structural element, ∘ a removable connection system that is configured to connect said support to the structure in such a way that said measurement sensor points toward the structural element, and ∘ a calculator that is configured to compare the value measured by the measurement sensor with the corresponding adjustment value, and to derive therefrom corrective actions to finalize adjustment of the structural element. ∘ at least one support, ∘ at least one measurement sensor that is attached to the support and is configured to measure a variation in a distance between said measurement sensor and the structural element, ∘ a removable connection system that is configured to connect said support to the structure in such a way that said measurement sensor points toward the structural element, and ∘ a calculator that is configured to compare the value measured by the measurement sensor with the corresponding adjustment value, and to derive therefrom corrective actions to finalize adjustment of the structural element.