Abstract : Dark shower is a generic feature of the Hidden Valley model, which produces bound states with a high multiplicity, low masses, and long lifetimes. The showering process can arise, for example, in Neutral Naturalness models, or in dark matter scenarios that explain the possible signal of gamma-ray excess. A collider search of such signals requires good vertex resolution, low energy threshold, as well as a good particle id to veto the background. I will explain why the LHCb experiment has a great potential in seeing dark showers and compare the estimated sensitivity to that of the future ATLAS/CMS searches.