Study of HH production at CMS

The production of the pairs of higgs bosons provides a direct handle on the structure of the Higgs field potential.While the di-higgs bosons production within the SM is very small and essentially out of the experimental reach within the Run I or II, several beyond SM theories foresee an enhancement that can be already probed with the available data. First searches for an inclusively produced heavy resonance that decays in pairs of higgs bosons within BSM theories, made using data collected during Run I by the CMS collaboration, are presented.