  The production of dijets is measured in diffractive deep-inelastic scattering
at HERA. The data were recorded with the H1 detector at DESY in the years
2003-2007. Diffractive events are selected by requiring a gap in the rapidity
distribution of the hadronic systen, where no particles are produced. Two jets
are selected with transverse momenta in the hadronic-centre-of-mass system
larger than 4 and 5.5GeV, respectively. Cross sections are measured single- and
doubledifferentially in various kinematic quantities. The data are found to be
in good agreement with NLO QCD calculations based on diffractive parton
densities determined frominclusive diffractive cross section measurements.
