  Element abundances of three roAp stars, HD 166473, HD 203932, and HD 217522,
were determined using Kurucz model atmospheres with metal abundances scaled to
solar ones and the results were compared with data from the literature
concerning three further roAp stars, normal B and A stars and two lambda Bootis
stars. Up to 38 elements could be identified and therefore, this work
represents the most complete chemical investigation hitherto published, which
can be summarized as follows:
  - all investigated roAp stars have a similar abundance pattern,
  - the overabundances of rare earth and other heavy elements are comparable to
cool non-pulsating Ap-stars,
  - iron belongs to the most deficient and cobalt to the most enhanced elements
in the group of the iron peak elements, and
  - the light elements carbon, nitrogen, and oxygen are less abundant than in
atmospheres with abundances scaled to the Sun.
  Beside an unexpected possible relation between effective temperature and
metallicity of roAp stars, no outstanding differences from non-pulsating Ap
stars could be detected. This statement, however, suffers from the lack of
comparably detailed investigations of the latter.
