A method for assembling a panel to a technical profile to form an interior element, such as a ceiling, preferably an interior element of a public transport vehicle, the method comprising at least the following steps: (a) providing at least one panel suitable for an interior, preferably of a public transport vehicle, the panel extending mainly along a first longitudinal direction and being delimited along a first transverse direction perpendicular to the first longitudinal direction by at least one end, the end comprising at least one zone for connection with a technical profile, the panel not being machined or folded in this connection zone, (b) providing the technical profile, this technical profile extending mainly in a second longitudinal direction and having at least one groove (6, 6A, 6B) for receiving the end of the panel, the receiving groove (6, 6A, 6B) extending mainly in the second longitudinal direction, and delimiting a volume for receiving the end of the panel, the receiving groove (6, 6A, 6B) having stops allowing insertion of the end of the panel only in an insertion position wherein the end of the panel is movable in the receiving volume of the receiving groove (6, 6A, 6B), the stops co-operating with the panel in a locked position, wherein the end of the panel is locked against translation in at least two directions other than the second longitudinal direction, the insertion position forming an angle with the locked position of between 5° and 40°, the technical profile comprising a plurality of faces, including a second face having two receiving grooves (6B, 6B'), the two grooves (6B, 6B') for receiving the second face being arranged in a row in a second transverse direction perpendicular to the second longitudinal direction, each groove (6B, 6B') having a width (WB, WB') in a vertical direction perpendicular to the second longitudinal direction and to the second transverse direction, the shallower receiving groove preferably being wider than the less shallow groove, (c) inserting the end of the panel into the groove (6, 6A, 6B) formed by the technical profile in the insertion position, and (d) rotating the panel and/or the technical profile about the second longitudinal direction to move the panel from the insertion position to the locked position and form an assembly comprising the panel and the technical profile. (a) providing at least one panel suitable for an interior, preferably of a public transport vehicle, the panel extending mainly along a first longitudinal direction and being delimited along a first transverse direction perpendicular to the first longitudinal direction by at least one end, the end comprising at least one zone for connection with a technical profile, the panel not being machined or folded in this connection zone, (b) providing the technical profile, this technical profile extending mainly in a second longitudinal direction and having at least one groove (6, 6A, 6B) for receiving the end of the panel, the receiving groove (6, 6A, 6B) extending mainly in the second longitudinal direction, and delimiting a volume for receiving the end of the panel, the receiving groove (6, 6A, 6B) having stops allowing insertion of the end of the panel only in an insertion position wherein the end of the panel is movable in the receiving volume of the receiving groove (6, 6A, 6B), the stops co-operating with the panel in a locked position, wherein the end of the panel is locked against translation in at least two directions other than the second longitudinal direction, the insertion position forming an angle with the locked position of between 5° and 40°, the technical profile comprising a plurality of faces, including a second face having two receiving grooves (6B, 6B'), the two grooves (6B, 6B') for receiving the second face being arranged in a row in a second transverse direction perpendicular to the second longitudinal direction, each groove (6B, 6B') having a width (WB, WB') in a vertical direction perpendicular to the second longitudinal direction and to the second transverse direction, the shallower receiving groove preferably being wider than the less shallow groove, (c) inserting the end of the panel into the groove (6, 6A, 6B) formed by the technical profile in the insertion position, and (d) rotating the panel and/or the technical profile about the second longitudinal direction to move the panel from the insertion position to the locked position and form an assembly comprising the panel and the technical profile.