Measurements of cross sections for events with charm and beauty jets in deep inelastic scattering at HERA are presented. Events with jets of transverse energy E(T)(jet) } 6 GeV and pseudorapidity - 1.0 { eta(jet) { 1.5 in the laboratory frame are selected in the kinematic region of photon virtuality Q(2) } 6 GeV(2) and inelasticity variable 0.07 { y { 0.625.