Open charm and beauty production at HERA

Measurements on open charm and beauty production in ep collisions at a center-of-mass energy of $s=300 GeV$ performed by the H1 experiment at HERA are presented. Final states containing charm are identified by the reconstruction of $D*±$ meson. Events containing muons and at least two jets were used to select data samples enriched with beauty. The results cover the region of negative four-momentum transfer squared, $Q2,$ from photoproduction $(Q2≈0)$ to deep inelastic scattering. The experimental results are compared with QCD predictions.