A supporting device for an interior layout assembly of an aircraft cabin, a related assembly and method are provided. The device includes a stationary frame; a table that can be deployed relative to the frame between a retracted position and a horizontal deployed position; a mechanism for guiding the movement of the table relative to the frame between the retracted position and the deployed horizontal position. The guide mechanism defines at least one bearing point for the table during its passage from the retracted position to the deployed horizontal position, the bearing point having a globally invariable position relative to the frame, the table being configured to pivot on the bearing point while moving laterally away relative to the bearing point, by sliding on the bearing point, to the deployed position.