A rotary angle sensor used to determine a relative angular position as compared to a reference position, comprising a housing (1), at least one rotor (3, 4) that is rotatably mounted inside said housing (1), one circuit board (2) containing electrical and/or electronic components as well as one or multiple stators corresponding to the number of used rotors (3, 4). The rotary angle sensor is supposed to be improved in such a manner that a particularly precise alignment of the first rotor (3) in relation to the stator is ensured and that it is inexpensive to manufacture. This is achieved by a first rotor (3) that is interlocked with the housing (1) without any play while a pre-loaded spring washer (14) is positioned on the latching arms (11).